Great for piston ar’s - Aero Precision Enhanced Carbine Buffer Tube

I’m hooked on piston driven AR’s especially the Primary Weapons Systems (PWS) long stroke piston system. I buy their uppers and build my own lowers to CA featureless compliance. The drawback on piston uppers is carrier tilt in the buffer tube, which can cause jams and misfeeds. Aero’s enhanced buffer tube has a lip that the BCG rides on avoiding carriers tilt.