The adams arms standard pistol length piston kit is a short stroke free-floating piston system that is self-cleaning and has a corrosive resistant coating.The kit includes: one-piece bolt carrier,.750" picatinny gas block with 3 settings, gas plug, bolt spring, drive rod with bushing and spring.This model requires a pistol gas length 4.846" from barrel extension to shoulder and a.750" gas seat.

Finish: Black
Type: Piston Kit
Model: Standard
Size: 223 Remington/5.56 NATO
Material: Steel