I'm selling an unfired Adams Arms piston conversion kit. This kit is for .223/5.56 barrels that utilize a .750" diameter gas block with a carbine gas port. The block is adjustable and has three settings: unrestricted, half gas for suppressed use, and a closed position. The kit includes the complete BCG required to make use of the piston. I'm asking 175.00 for the complete kit, I live in Harahan and I'd like to make the transaction somewhere in the greater New Orleans area.