Adams Arms AR-15 Piston Conversion Kit | An Official Journal Of The NRA
Adams Arms FGAA03221 P Series Adjustable Micro Block 223 Rem,5.56x45mm NATO Black Steel Rifle Length Piston Kit: B Tactical Shop: B Tactical
Adams Arms piston kit on carbine C.O.P. I see Aero sold ones that were “modified” to be compatible with the pic rail block but I can't tell what the difference is. Anybody