Adams Arms’s 308 piston kit converts your DPMS .308 Gen II direct impingement rifle to a clean, cool, reliable system without extensive modifications. The patented piston system is a drop-in system that works on any mil-spec AR-15 and is compatible with most standard AR-15 parts. Our kits have been treated by various coating applications to increase Durability, Lubricity, and Longevity, and come with a Lifetime Warranty.
The Adams Arms Retro-Fit Piston Drive System uses the same gas port on the barrel to work the action of its 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.
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.
This system will work with the mid-length DPMS Gen II ONLY
WILL NOT WORK ON LR308 or AR-10 PLATFORMS
Patented One-Piece Bolt Carrier
P Series Micro Block – Adjustable (5 Settings – 100%/74%/53%/32%/11%)
Upper Receiver Bushing
Bushing Installation Rod
Drive Rod with Bushing and Spring
P Series MLOK Rail
Installation Instruction Card
The Adams Arms Piston System:
A short stroke free floating piston system.
Carbon and gases are expelled forward, away from operator.
Corrosive resistant coating processes.
Harmonics are not transferred into the barrel.
Doesn’t vent directly to atmospheric pressure; this eliminates flash signature and super sonic crack which is optimal for night vision and suppresses fire.
Has a Lifetime Warranty.
*Ships free from Adams Arms, backorder may be required.