The Adams Arms lightweight gas piston conversion kit is a complete retrofitting kit that takes a standard direct gas impingement system AR-15 and converts it with a cooler, cleaner, short stroke gas piston. Installing a piston system on an AR-15 prevents the harmful gas and debris from being sent back in the chamber to cycle the firearm. Piston systems increase overall reliability while also decreasing the amount of maintenance required to keep he firearm operational. This kit can be added to your rifle with no permanent modifications; however some free floating handguard will not be compatible with this system. The manufacturer has a complete list of compatible hand guards.

Includes:
.625" Diameter low profile gas block
Gas piston
Piston return spring and bushing
Operating rod
Upper receiver bushing
Installation hardware
1 Piece bolt carrier with integral piston strike face
Bolt spring
Instructions

Fits:
Rifle Length Gas System
.625" Diameter Barrel
Adams Arms AR-15 conversion kit system is compatible with .223 Remington/5.56x45mm NATO/6.5x38mm Grendel/6.8x43mm Remington SPC/5.45x39mm