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Questions & Answers
Guys what bolt to I need to use? Can I use a standard bolt, if not where can I find the correct bolt so I can complete this build? Expert Answer

I would recommend contacting the manufacture.
Adams Arms (727) 853-0550

by Ben, Gear Expert, September 13, 2021
I see the note about a bushing and dowel not being included. can I still install and use the product? I want it, but only if I can use it. thank you! Expert Answer

I would recommend contacting the manufacture.
Adams Arms (727) 853-0550

by Ben, Gear Expert, September 13, 2021
Customer Reviews
Helpful Positive Review
It's custom. by Wes, Verified Owner, December 1, 2021
The AR 15 was not designed or intended to run a piston. Which means every AR built with one is custom. A custom build will come with custom problems. Hand guard selection is tricky. Look on the Adams website for a full list of compatible handguards. ...
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5/5 found this helpful
Helpful Positive Review
Great piston setup option by Will Smith, Verified Owner, May 1, 2018
The Adams Arms kits are great for building piston rifles or for retrofitting to a piston setup. These aren't for the faint hearted though and do require some work to install them. If you're unsure about doing it, it's best to find someone who's compe...
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4/4 found this helpful
Helpful Positive Review
Pistol piston kit by RBWVETDOC, March 5, 2018
Fits like a glove. No more gas in the face when shooting with a suppressor. Easy instal and very easy to clean. Keeps bolt carrier group ridiculously clean. Highly recommended for anyone wanting to build a pistol AR with a piston.
1/1 found this helpful
Helpful Positive Review
Quality you expect by Steve W., January 11, 2019
All of the Adam's arms stuff I've worked with is solid quality stuff. It's not the biggest name, not super fancy, but its good. I've done two piston builds and if you do your job putting it together and use quality components it will run all day.
2/2 found this helpful
Helpful Positive Review
10.5” pistol install by Quade, February 22, 2020
I run several Adams Arms piston kits and this one is no different. After some buffer and spring tuning, it runs flawlessly. I use some custom bushing on the rod to achieve the correct final gap of the operating rod with different barrel nuts. They ar...
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4/4 found this helpful
Helpful Positive Review
Will definitely buy again! by Lonnie, April 15, 2020
Works perfectly! I do recommend using the written instructions on the Adams Arms website, in conjunction with their installation video. The video leaves out some details. Also, you’ll need to separately purchase the modified handguard cap if using ha...
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2/2 found this helpful
Read All 27 Reviews
Color: Black Gas System Length: Pistol Length Caliber: .223 Remington , 5.56x45mm NATO Included Accessories: .750 Picatinny Gas Block , Bolt Spring , Drive Rod with Spring , Gas Plug , Installation Instruction Guide , One-Piece Bolt Carrier Condition: Factory DEMO Condition Quality: Fair Condition Details: Missing Item

Code: ADA-GCK-SPPKPL-FGAA-03104-EDEMO-MI-D

MPN: FGAA-03104-EDEMO2

Product No Longer Available

Product Info for Adams Arms Standard Picatinny Block Piston Kit

The Adams Arms Retro-Fit Piston Drive System uses the same gas port on the barrel to work the action of our inverted piston. Instead of directing the gases into the receiver, they go into a gas plug and drive rod sleeve invented by Adams Arms. The gases are contained inside the drive rod sleeve and push the bolt carrier rearward using the gas pressure to cycle the action.image

Adams Arms proprietary operating systems mechanically actuate the bolt carrier external of the receiver. This keeps the internal receiver and all the critical moving parts clean and free from heat and carbon build up.

Here are some of the main differences when using the Adams Arms Operating System:

  • Short Stroke Free Floating Piston System
  • Self Cleaning
  • Carbon and gases are expelled forward, away from the operator
  • Bolt Carrier Group and other critical components remain cool and clean
  • Corrosive resistant coating processes
  • Harmonics are not transferred into the barrel
  • Adjustable gas settings for various applications
  • Doesn't vent direct to atmospheric pressure; this eliminates flash signature and supersonic crack which is optimal for night vision and suppressed fire

Please note that the Receiving Bushing and Installation Dowell are no longer included.

Features of Adams Arms Standard Picatinny Block Piston Kit:

To select the correct length kit, use the following measurements:

  • Pistol: 4.846" from barrel extension to shoulder
  • Carbine: 7.866" from barrel extension to shoulder
  • Mid: 9.866" from barrel extension to shoulder
  • Rifle: 13.241" from barrel extension to shoulder

Please note that the Receiving Bushing and Installation Dowell are no longer included.

Package Contents:

Adams Arms Standard Picatinny Piston Kit

  • Patented One-Piece Bolt Carrier
  • .750" Picatinny Gas Block with 3 settings (full gas for standard fire, half gas for suppressed, no gas for single shot)
  • Gas Plug
  • Bolt Spring
  • Installation Instruction Card

Please note that the Receiving Bushing and Installation Dowell are no longer included.

Ammunition

152 / 52
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Related Products to Adams Arms Standard Picatinny Block Piston Kit

Adams Arms Standard Picatinny Block Piston Kit Unavailable & Discontinued Models

List of Unorderable Models

  • USED Adams Arms Piston Kit, Standard Picatinny Block, Pistol Length, Standard BCG/.750 Gas Block/Drive Rod, Black, FGAA-03104, EDEMO2, Condition Fair, Missing Item , MPN: FGAA-03104-EDEMO2 , Code: ADA-GCK-SPPKPL-FGAA-03104-EDEMO-MI-D
  • USED Adams Arms Piston Kit, Standard Picatinny Block, Pistol Length, Standard BCG/.750 Gas Block/Drive Rod, Black, FGAA-03104, EDEMO3, Used, Condition Fair , MPN: FGAA-03104-EDEMO3 , Code: ADA-GCK-SPPKPL-FGAA-03104-EDEMO3
  • DEMO, Adams Arms Piston Kit, Standard Picatinny Block, Rifle Length, Standard BCG/.750 Gas Block/Drive Rod, Black, FGAA-03113 , MPN: FGAA-03113-DEMO , Code: ADA-GCK-SPPKPL-FGAA-03113-DEMO
  • USED Adams Arms Piston Kit, Standard Picatinny Block, Carbine Length, Standard BCG/.750 Gas Block/Drive Rod, Black, FGAA-03107, EDEMO2, Used, Condition Like New , MPN: FGAA-03107-EDEMO2 , Code: ADA-GCK-SPPKPL-FGAA-03107-EDEMO2
  • DEMO, Adams Arms Piston Kit, Standard Picatinny Block, Pistol Length, Standard BCG/.750 Gas Block/Drive Rod, Black, FGAA-03104 , MPN: FGAA-03104-DEMO , Code: ADA-GCK-SPPKPL-FGAA-03104-DEMO
  • Adams Arms Piston Kit, Standard Picatinny Block, Pistol Length, Standard BCG/.750 Gas Block/Drive Rod, Black, FGAA-03104 , MPN: FGAA-03104 , UPC: 812151022271 , Code: ADA-GCK-SPPKPL-FGAA-03104
  • Adams Arms Piston Kit, Standard Picatinny Block, Carbine Length, Standard BCG/.750 Gas Block/Drive Rod, Black, FGAA-03107 , MPN: FGAA-03107 , UPC: 812151022257 , Code: ADA-GCK-SPPKPL-FGAA-03107
  • DEMO, Adams Arms Piston Kit, Standard Picatinny Block, Mid Length, Standard BCG/.750 Gas Block/Drive Rod, Black, FGAA-03110 , MPN: FGAA-03110-DEMO , Code: ADA-GCK-SPPKPL-FGAA-03110-DEMO
  • Adams Arms Piston Kit, Standard Picatinny Block, Mid Length, Standard BCG/.750 Gas Block/Drive Rod, Black, FGAA-03110 , MPN: FGAA-03110 , UPC: 812151022264 , Code: ADA-GCK-SPPKPL-FGAA-03110
  • Adams Arms Piston Kit, Standard Picatinny Block, Rifle Length, Standard BCG/.750 Gas Block/Drive Rod, Black, FGAA-03113 , MPN: FGAA-03113 , UPC: 812151022288 , Code: ADA-GCK-SPPKPL-FGAA-03113
  • DEMO, Adams Arms Piston Kit, Standard Picatinny Block, Carbine Length, Standard BCG/.750 Gas Block/Drive Rod, Black, FGAA-03107 , MPN: FGAA-03107-DEMO , Code: ADA-GCK-SPPKPL-FGAA-03107-DEMO
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