Lewis Machine & Tool Company's LMT Gas Piston System is designed to upgrade the AR/M4/M16 series of carbines and rifles. It builds on LMT's CQB MRP platform and runs cooler and cleaner than standard ...
Addax Tactical's AR Gas Piston Upper, the ATAC-GPU (Advanced Tactical AR Carbine Gas Piston Upper), utilizes a specially designed, self regulating, long stroke piston system, for enhanced dwell time ...