Add-a-Shell (3 Piece)

$11.99

In stock

Add-a-Shell Shot Shell Holders (3 Quantity Pack) [Fits Mossberg ATI Scorpion Package]

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Fits: ATI Halo Side Saddles

  • Modular Add-a-Shell Shotgun Shell Holders
  • Includes Three Add-A-Shells
  • Military Grade Synthetic Construction
  • Add as Many Individual Shell Holders as Desired in any Configuration
  • Secures Shotgun Shell Firmly in Place
  • Limited Lifetime Warranty
  • Made in the USA

Note:  This Add-A-Shell 3-Pack can be used to complete your Mossberg ATI Scorpion Package. ATI reccomendeds ordering enough Add-A-Shells to complete your side saddle by filling all 9 hole locations with the same style Add-A-Shell.

Warning! – Do Not Over Tighten Screws
Stripped Holes and Broken Screw Heads are NOT Covered Under the Warranty

PDFAdd-a-Shell Shot Shell Holders

Share your thoughts!

4.92 out of 5 stars

100 review

What others are saying

  1. Paul Nelson

    Shellholder Superb
    100

    by Paul Nelson (verified owner)

    Easy mounting, straightforward, thankfully, as there were no instructions included. If there were, it would have been nice to have been notified that the dob of lock-tite, or whatever it was, applied to the mounting screws, would provide a bit of a challenge/exercise getting the mounting screws fully seated. The holders are snug on a shell, and do have two distinct and different ends, so one can choose to have your shotgun shells either loaded for up or down extraction. The cutout facing the sidewalls of the shotgun is a perfect snug fit to the rail on the gun meant for this mounting.
    Seems to keep everything “high and tight” so to speak, and does not seem to add a lot of mass or handling extra challenge — still points quickly and naturally with now having 12 holders mounted and populated with thee “extra” shells.

    300198 (0) 300198 (0) 300198

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  2. Richard Bradley

    Filling in the gaps
    100

    by Richard Bradley (verified owner)

    Easy to install, works great. Perfect match to the ones that came already installed on a Mossberg 500 Scorpion purchased last year. Will be tight when first loaded but loosen a bit over time/use.

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  3. JAMES R.

    Great upgrade!
    100

    by JAMES R. (verified owner)

    Rec’d it quickly and the fit was perfect!!

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  4. Vyacheslav G.

    Fast delivery
    100

    by Vyacheslav G. (verified owner)

    Products were delivered faster than their status was updated. 🙂

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  5. Joshua R.

    More is better
    100

    by Joshua R. (verified owner)

    My most cruiser cam with 3, I added 6 and the mini shell adapter. Now it hold 9 in the tube and 18 on the sides. 1 in the ready.

    252170 (0) 252170 (0) 252170

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  6. Bruce M.

    Mossberg 500 ATI tactical scorpion
    100

    by Bruce M. (verified owner)

    I have been looking for a tactical shotgun for quite some time
    From the minute I walked into the local gun shop and saw it hanging on the wall I knew that that was the one I wanted with the adjustable stock and pistol grip padding and the look of it I love it
    With the great ideas at ATI and the great service I ordered some more shell holders to put on my other shotgun they’re a great company and look forward to doing more business with them five star

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  7. Conrad W.

    Looks great
    100

    by Conrad W. (verified owner)

    Looks awesome on the gun and performs perfectly.

    252168 (0) 252168 (0) 252168

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  8. Mario R.

    Very good
    100

    by Mario R. (verified owner)

    Very good

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  9. Justin C.

    Fits great
    100

    by Justin C.

    Fits great

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  10. Bigsam

    add a shell
    100

    by Bigsam

    i have a shockwave stx these come in a 3 pack my gun only has 2 holes left why not a 2 pack

    252165 (0) 252165 (0) 252165

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  11. John K.

    Adding shell carriers to Mossberg Stinger ATI
    100

    by John K.

    Just purchased an ATI Add a Shell kit to add more carriers to the 3 already installed on a recent Mossberg Stinger ATI. Love the gun with it’s pre-installed ATI furniture. Would have been nice to have enough Add a Shell units included with the gun to fill all 9 positions instead of just the 3 it originally call with. That said it easy. Inexpensive and fast to order what was needed from ATI.

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  12. Michael D.

    Great product!
    100

    by Michael D.

    Michael – Outstanding product! I would have gotten 5 stars if it had come with the appropriate hex wrench to mount it!

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  13. Guest

    Perfect
    100

    by Guest

    Goes well on my scorpion.

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  14. Mario R.

    Wow!
    100

    by Mario R.

    Simply an amazing Company.

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  15. Guest

    Just as described
    100

    by Guest

    Sturdy add on with simple install.

    252159 (0) 252159 (0) 252159

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  16. Kent C.

    Nice product
    100

    by Kent C.

    Works well on the Mossberg 500. Adds additional rounds on the weapon very easily. Works well with 12 gauge short rounds.

    252160 (0) 252160 (0) 252160

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  17. Dan B.

    Mossberg Shockwave SPX
    100

    by Dan B.

    Same as the supplied 3. Bought two sets to fill in all the spots for the side saddle. Perfect

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  18. Keith B.

    Great add on
    100

    by Keith B.

    Fit right on to the receiver on my scorpion

    252158 (0) 252158 (0) 252158

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  19. Jim D.

    Add-a-shell(s) to Mossberg Shockwave
    100

    by Jim D.

    These (3) are the same as the (5) that the Shockwave comes with (Not 7 as Mossberg has indicated) and installed perfectly as one would expect.
    Why (3), though, and Not a 2-Pack, since (2) are all you can add ?
    But for the price, just asking, not complaining 🙂

    252157 (0) 252157 (0) 252157

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  20. Robert D.

    Great
    100

    by Robert D.

    They work just fine

    252155 (0) 252155 (0) 252155

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  21. John H.

    Nice upgrade!
    100

    by John H.

    Nice product! A little over priced in my opinion but a “GREAT” upgrade to my shotgun.

    252156 (0) 252156 (0) 252156

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  22. Isaiah

    THANK YOU MY GOD!!!!
    100

    by Isaiah

    Long story short for my Mossberg ATI Tactical Pump Action 12 Gauge Shotgun: Perfect fit! Same look of my other 3 halo side saddle on the shotgun at purchase!! Other gun stores websites Google, Amazon, and even Mossberg store was a failure!!!MAKE THIS PURCHASE AND FINALLY BE HAPPY TO MUSCLE UP YOUR SHOTGUN!!!!

    252153 (0) 252153 (0) 252153

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  23. Monte

    Nice product
    100

    by Monte

    Ordered for my ATI Halo side saddle. Perfect fit

    252154 (0) 252154 (0) 252154

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  24. Lucas G.

    Nice add-on
    100

    by Lucas G.

    Perfect additions to any mossy 500 scorpion when you want a few more than the lousy 3 the gun comes with. “Tactical” marketing between Mossberg and ATI

    252152 (0) 252152 (0) 252152

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  25. Brandon C.

    Great Addition to my ATI
    100

    by Brandon C.

    Great Addition to my ATI Scorpion!

    252151 (0) 252151 (0) 252151

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  26. Douglas S.

    Great Ad On
    100

    by Douglas S.

    Handy little gadgets….got 9 on my tac shot gun. Gives me a total of 15 rounds. Easy installation.

    252150 (0) 252150 (0) 252150

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  27. Mike G.

    Perfect add to my 500 ati
    100

    by Mike G.

    As expected with suprisingly quick ship

    252149 (0) 252149 (0) 252149

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  28. Guest

    Add-A-Shell 3-Piece
    100

    by Guest

    The only shell holders that would fit my Mossberg 500 ATI Scorpion. My shotgun came with only 3 holders, so I ordered two sets– now I have 9 shells on my Scorpion (like all the other Scorpion owners on here). Great product.

    252147 (0) 252147 (0) 252147

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  29. Jason

    Add a shell
    100

    by Jason

    Awesome product for additional shells for my Mossberg ATI scorpion!

    252145 (0) 252145 (0) 252145

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  30. Ethan B.

    Great
    100

    by Ethan B.

    Exactly like stock mounts on ati gun! No problems at all looks identical

    252146 (0) 252146 (0) 252146

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  31. Bill S.

    Added extra capacity to my ATI 500 Mossberg
    100

    by Bill S.

    Order arrived on a timely basis. The shell holders were attached by 1 screws with an Allen wrench. Took about 5 minutes and double my extra rounds capacity.

    252148 (0) 252148 (0) 252148

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  32. Doc J.

    shot shell carrier
    100

    by Doc J.

    Nice fit and finish. Screws were hard to get started due to “lock tight” on only one side of the screw.

    252144 (0) 252144 (0) 252144

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  33. Guest

    perfect
    100

    by Guest

    perfect

    252143 (0) 252143 (0) 252143

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  34. Russ S.

    Fit well and works perfectly.
    100

    by Russ S.

    Fit well and works perfectly.

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  35. Jordan R.

    Perfect add on!
    100

    by Jordan R.

    Added an additional 3 to my scorpion 500 and they look great! Another great ATI product!

    252141 (0) 252141 (0) 252141

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  36. Brent Y.

    Exactly what I ordered
    100

    by Brent Y.

    Exactly what I wanted

    252140 (0) 252140 (0) 252140

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  37. Guest

    Additions to shotgun
    100

    by Guest

    Perfect

    252139 (0) 252139 (0) 252139

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  38. Carlos G.

    Awesome addition
    100

    by Carlos G.

    Easy to install. Looks great on the gun, sturdy. Recommend

    252137 (0) 252137 (0) 252137

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  39. Guest

    Awesome delivery time & products
    100

    by Guest

    Awesome delivery time & products thank you ATI

    252136 (0) 252136 (0) 252136

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  40. Josue T.

    Shell holders
    100

    by Josue T.

    Great look and easy to install. Adds an aggressive look you want.

    252135 (0) 252135 (0) 252135

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  41. Marcelino B.

    As Advertised
    100

    by Marcelino B.

    I bought a Mossberg 500 ATI Scorpion which came with 3 of these already and the other 6 I bought fit just the same.

    252138 (0) 252138 (0) 252138

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  42. Rodolfo F.

    500 scorpion ATI
    100

    by Rodolfo F.

    Exactly what my mossberg 500 scorpion needed to max out the side saddle shot holders. Simple to install, just needed an 1/8th size allen hex key. Holds on to shotshells securely.

    252133 (0) 252133 (0) 252133

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  43. Guest

    Easy purchase
    100

    by Guest

    Fast and easy.

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  44. Guest

    Add All The Shells!
    100

    by Guest

    Works perfectly, easy to install, holds shells tightly in place, and very reasonably priced! The perfect addition to my Mossberg 500 ATI!

    252131 (0) 252131 (0) 252131

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  45. Vincent G.

    Awesome
    100

    by Vincent G.

    Was everything I expected it to be and more very fast shipping very happy with the product would recommend ATI to all my friends thank you for a great service

    252134 (0) 252134 (0) 252134

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  46. Damien P.

    Work Great, Look Tough!!!
    100

    by Damien P.

    Bought six for my Mossberg 500 ATI and they look and work great. Highly recommended!

    252130 (0) 252130 (0) 252130

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  47. Darryl H.

    Thanks
    100

    by Darryl H.

    Great product, quick service

    252129 (0) 252129 (0) 252129

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  48. Guest

    Great add on to my
    100

    by Guest

    Great add on to my scorpion need 3 more

    252128 (0) 252128 (0) 252128

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  49. Guest

    Mossburg 500
    100

    by Guest

    Great addition

    252126 (0) 252126 (0) 252126

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  50. Che H.

    As advertised
    100

    by Che H.

    As advertised

    252127 (0) 252127 (0) 252127

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  51. Anthony F.

    Mossberg Scorpion
    100

    by Anthony F.

    Fills in the missing spaces and finishes the look

    252125 (0) 252125 (0) 252125

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  52. Guest

    Add a shell holder.
    100

    by Guest

    Fits the scorpion perfectly.

    252124 (0) 252124 (0) 252124

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  53. Ralph A.

    Got this for my mossberg500
    100

    by Ralph A.

    Got this for my mossberg500 they fit perfect and like the way it looks

    252123 (0) 252123 (0) 252123

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  54. Diego F.

    Perfect
    100

    by Diego F.

    Perfect item ,highly recommended

    252122 (0) 252122 (0) 252122

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  55. Frank P.

    3 shell shot holder
    100

    by Frank P.

    Great product!

    252120 (0) 252120 (0) 252120

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  56. Rajib A.

    Perfect for my Mossberg 500 ATI
    100

    by Rajib A.

    Bought 2 sets (6 shell holders). Perfect to complete my Mossberg 500 ATI which only comes with 3 holders. Easy to install.

    252121 (0) 252121 (0) 252121

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  57. Patrick S.

    Great service
    100

    by Patrick S.

    Package arrived on time an my add a shell 3 pack matched perfect with the ones on my mossberg 500 scorpion although when you buy the weapon ATI should provide the full amount of shell holders

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  58. Sean H.

    Perfect
    100

    by Sean H.

    Price and quality great

    252117 (0) 252117 (0) 252117

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  59. Frank S.

    9 shells ready for reload
    100

    by Frank S.

    Easy install on the Mossberg Scorpion. 9 shells at your disposal..

    252118 (0) 252118 (0) 252118

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  60. Louis R.

    ATI Add a Shell
    100

    by Louis R.

    Well Designed Shell holder, looks great on the shotgun, high impact plastic , will last forever…great purchase

    252115 (0) 252115 (0) 252115

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  61. Sean K.

    One could always use more shells
    100

    by Sean K.

    Just purchased my Mossberg 500 ATI Scorpion and was a little disappointed it only had 3 slots for extra shells. So I purchased these, 6 more total so now I have 9 shells on my shotgun. Looks so nice!

    252116 (0) 252116 (0) 252116

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  62. Steve W.

    High Quality Product!
    100

    by Steve W.

    I am new to tactical shotguns but recently purchased a Mossberg 500 ATI scorpion. It came with three extra shell holders on the side of the receiver but also had a place for an additional six. I searched the web and found ATI’s website and ordered six shell holders and mounted them to the receiver. They are high-quality and hold the shells just firm enough to where the shells can be removed without a lot of effort. This is a newer design than the original fully enclosed shell holders and look to last a long long time and will be fun learning how to do tactical reloads! Have a total of nine extra shells now at my disposal!

    252114 (0) 252114 (0) 252114

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  63. Guest

    Easy Great Add - Ammo At Your Fingertips
    100

    by Guest

    Good quality and very easy install on my ATI Scorpion Mossberg 500 12w Gauge

    252113 (0) 252113 (0) 252113

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  64. Tyler C.

    3 piece
    100

    by Tyler C.

    Awesome product definitely recommend fits perfectly on my mossberg scorpion!

    252111 (0) 252111 (0) 252111

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  65. Justin V.

    Great product
    100

    by Justin V.

    Easy to install

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  66. Julian G.

    AWESOME
    100

    by Julian G.

    Good quality and awesome costumer service they fit Mossberg ATI SCORPION like a glove and it comes with all the necessary tools for the job

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  67. Denys M.

    I love these, now my
    100

    by Denys M.

    I love these, now my shotgun has all 6 extra slugs:)

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  68. Jemel C.

    Topping off my Scorpion
    100

    by Jemel C.

    I wanted to finish off my Mossberg 500 Ati Scorpion, the add a shell was an easy install and affordable too. Love my ATI products

    252108 (0) 252108 (0) 252108

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  69. Mark P.

    Mossberg 500 Scorpion
    100

    by Mark P.

    Added two orders of three to the ATI Sidesaddle on my Mossberg 500 Scorpion. Couldn’t be happier with my purchase. Sidesaddle is now fully populated, nine shell holders.

    252107 (0) 252107 (0) 252107

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  70. William H.

    Good product
    100

    by William H.

    The product is well made and goes on easy. It will hold your shells no matter which way you put them in. Highly recommended.

    252106 (0) 252106 (0) 252106

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  71. Virgil R.

    3 piece add-a-shell
    100

    by Virgil R.

    I purchased 2 of the 3 piece add-a-shells to add to my Mossberg 500 ATI tactical 12 gauge. It came with 3 but I wanted all 9 spaces to have shell holders. Very easy to install and they work great. At the range I shot 20 rounds of 1600fps slugs and none of the shells even started to slide out. they look great on the gun also.

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  72. Violeto A.

    3 piece Add-A-Shell
    100

    by Violeto A.

    The ordering process was very smooth and easy. The items also arrived in a timely manner. Add-a-Shell is is easy to install and is perfect for holding extra shells and for quick reload.

    252104 (0) 252104 (0) 252104

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  73. Robert L.

    Added the finishing touch
    100

    by Robert L.

    I bought the Mossberg 500 ATI Scorpion and it included three single shell holders. There was room for three more on the left side of the shotgun, so I ordered another set and I could not be more pleased with the functionality they add by allowing me to carry a full magazine load on the shotgun.

    252102 (0) 252102 (0) 252102

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  74. Justin K.

    Perfect fit!
    100

    by Justin K.

    Perfect fit!

    252103 (0) 252103 (0) 252103

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  75. Amarcus W.

    Fits beautifully
    100

    by Amarcus W.

    Fits beautifully

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  76. Ruben S.

    Great products:thumbsup::type_4:
    100

    by Ruben S.

    Great products:thumbsup::type_4:

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  77. Adolph G.

    Just what i wanted. hold
    100

    by Adolph G.

    Just what i wanted. hold shells nice

    252099 (0) 252099 (0) 252099

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  78. Larry B.

    Good high quality shell holder
    100

    by Larry B.

    Got a triple pack of these to add on to my new Mossberg 500 ATI scorpion and bring the side saddle count to 6. Went out for a day on the range and I was very satisfied with the added capacity, the quick access placement, durability, and snug grip of these holders.

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  79. Christopher P.

    Add-a-shell (3-Piece)
    100

    by Christopher P.

    Good quality and good service. Great aesthetic addition to my mossberg.

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  80. John H.

    Gets the job done
    100

    by John H.

    I wanted the Halo aluminum shell holders but was completely unable to find them for sale. These shell holders are neither as sturdy nor as well made, but they attach properly and sit flush with the receiver. They function well, and I am satisfied with them. So far their only failing is not being the aluminum Halo ones I wanted!

    252096 (0) 252096 (0) 252096

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  81. Cat

    Perfect
    100

    by Cat

    This was just what i was looking for. Only ATI seems to sell these single shell add ons. I bought two of thiese to fill all the slots on my shotgun. Looks very nice adding to the tactical look.

    252094 (0) 252094 (0) 252094

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  82. James L.

    Add a Shell
    100

    by James L.

    Excellent product, easy install

    252093 (0) 252093 (0) 252093

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  83. Carlos Y.

    Amazing
    100

    by Carlos Y.

    Awesome product!!! high quality!

    252095 (0) 252095 (0) 252095

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  84. Steve A.

    Must Have
    100

    by Steve A.

    I own the Mossberg 500 ATI Scorpion that came with three of these on it & the ability to add six more. They are so cool looking I had to add them. Now I can hold Nine extra shells easily on the shotgun. They went on super easy & are a quality product that I would buy again. I use reviews to help decide about buying a product or not so I feel providing an honest review whether good or bad is important.

    252092 (0) 252092 (0) 252092

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  85. Brad C.

    Perfect fit
    100

    by Brad C.

    Bought 6 (2- 3 packs) of these for my Mossberg 500 Scorpion. Perfect fit and easily installed in less then 10 minutes.

    252091 (0) 252091 (0) 252091

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  86. Jackson W.

    Shells when you need them
    100

    by Jackson W.

    The ATI Add-a-Shell system is exactly what I hoped it would be- simple to install and well-made. I put these on my Mossberg 500 ATI Scorpion, and it turned out better than I could’ve hoped. Another excellent product from ATI.

    252090 (0) 252090 (0) 252090

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  87. Jose M.

    Great add on
    100

    by Jose M.

    Great add on

    252089 (0) 252089 (0) 252089

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  88. Brett R.

    Great Product
    100

    by Brett R.

    Very easy to install and it holds the shells tight. I’m very pleased with this purchase.

    252087 (0) 252087 (0) 252087

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  89. J S.

    Holds Shells well in place
    100

    by J S.

    While this is not the same ones as the Halo ones, these will do just fine. If you don’t mind them looking different.

    252088 (0) 252088 (0) 252088

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  90. Scott W.

    Shell holder
    100

    by Scott W.

    I added 6 new shell holders to my Miss 500 ATI Scorpion 12ga Tactical Shotgun. They fit great. Look Awesome and work perfect.

    252086 (0) 252086 (0) 252086

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  91. Norman C.

    Add a shell
    100

    by Norman C.

    Fits mossberg 500 scorpion perfectly.

    252084 (0) 252084 (0) 252084

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  92. Shawn M.

    Great Mossberg Add
    100

    by Shawn M.

    Nice add to any Mossberg

    252085 (0) 252085 (0) 252085

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  93. Craig H.

    Shell saddle
    100

    by Craig H.

    Craig Hansen

    252083 (0) 252083 (0) 252083

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  94. Daniel M.

    add a shell 3 piece
    100

    by Daniel M.

    Easy to install , work as advertised , shipped quickly…

    252082 (0) 252082 (0) 252082

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  95. Stephen V.

    Somewhat disappointed
    100

    by Stephen V.

    When I ordered these shell holders, I thought they would be like the steel holders that came with my ATI Mossberg 500. These are plastic, and while they do the job, I was wanting metal.

    252081 (0) 252081 (0) 252081

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  96. Larry

    Great Item
    100

    by Larry

    I hope I get them this time. I ordered thru Amazon and never received them, don’t know if USPS screwed up or if someone with USPS stole them. Hoping for best. The ATI Scorpion Mossburg is a great addition for my home protection.

    252077 (0) 252077 (0) 252077

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  97. Joe F.

    Add a shell
    100

    by Joe F.

    Excellent product!

    252080 (0) 252080 (0) 252080

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  98. Ann H.

    Excellent addition
    100

    by Ann H.

    This was an easy addition to a gun which only had 3 shell holders on the rail.

    252078 (0) 252078 (0) 252078

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  99. Peter S.

    Purchased this to add on
    100

    by Peter S.

    Purchased this to add on to the 5 shell unit. The “add-a-shell” units were easy to install. One grip, the color of the metal coating does not match. Otherwise smooth install.

    252079 (0) 252079 (0) 252079

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  100. Miguel L.

    Never got it
    100

    by Miguel L.

    Seem the USPS delivered to the wrong location, and I’m still waiting for it. But the Shell holder is obviously made in high standard and love how ATI put the effort into there packaging. I will update the stars if and when I actually get the product.

    252076 (0) 252076 (0) 252076

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