AR-15 custom built piston uppers  (Prices vary upon build) -Barrel 10.5 inch White oak armament 1/8 twist w/wylde chamber and m4 feed ramps. Salt bath nitride treated for corrosion resistance and extended round count. All NFA rules apply! -MPC bolt carrrier goup with Adams arms one piece carrier.  All nickel teflon coated to allow for increased durabilitly, functionality, and easy cleaning. -Adams arms piston kit, for increased durabality and reliability. -Rail system SPF Daniel Defense 9.5 lite rail system to make one complete top rail for ease in optic mounting and minimal weight addition. -T-marked upper with m4 feed ramps to ensure propper cartridge feeding.