This is the Adams Arms Piston Conversion kit that will work with any .223/5.56x45mm NATO AR-15 Rifle. 

Kit Includes: 
  • 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 
  • Upper Receiver Bushing 
  • Bushing installation Rod
  • Blot Spring 
  • Rifle Length Drive Rod with Bushing and Spring 
  • Installation DVD 
  • Free Samson Evolution 12" Extended Rail

Adams Arms Piston System is a short stroking free floating piston system. Self cleaning, carbon and gases are expelled forward away from the operator. Corrosive resistant coating process and harmonics are not transferred into the barrel. It does not vent directly to the atmosphere pressure, eliminating flash signature and super sonic crack which is optimal for night vision and suppressed fire.