16" 5.56x45 L.P.R. Mid-Length Piston Upper with Aero Precision M-Lok Handguard

A: Yes we can use a Aero Precision Enhanced Quad Handguard...they just have been hard to come by on dealer side of Aero Precisions Dealer sales.

A: Uppers should start coming back in stock around end of summer or shortly thereafter.

A: Standard Carbine Buffer and Spring

A: We build cycling super and subsonic piston uppers for Beck Ammunition aka Beck Defense. They approached us about 4 years ago to do a piston system that would cycle super and subsonic ammunition for them. They are the exclusive provider for piston uppers that cycle their super and subsonic ammunition: http://beckammunition.com/5.56mm-cycling-subsonic-rifle

A: We have Troy Front and Rear Flip Up Battlesights and they are $200.00 to add to the upper.