The Adams Arms Standard Mid Length Piston Kit a short stroke free floating piston system that is self-cleaning and has a corrosive resistant coating. The kit includes an one-piece bolt carrier, .750" Picatinny gas blck with 3 settings, gas plug, upper receiver bushing and installation rod, bolt spring, drive rod with bushing and spring, and a M4 style modified Handguards, and a modified handguard cap.
This model also includes an installation DVD and requires a carbine gas length 7.866" from barrel extension to shoulder and a .750" gas seat.
|Size||223 Remington/5.56 NATO|
Determined at checkout.