The Primary Weapon Systems MK1 MOD 1-M Pro Complete Lower Receiver is their standard Mil-Spec model yet still comes with some of the enhanced features that the MOD 2-M has. This forged AR-15 lower receiver comes with the PWS enhanced fluted buffer tube with ratchet lock castle nut and QD end plate. Attached to the buffer tube is a Bravo Company USA stock. It also comes with the PWS enhanced H2 buffer weight optimal for use on rifles with shorter barrels. The ergonomic Bravo Company USA pistol grip and Nickel PTFE coated trigger round at this amazing value AR-15 lower receiver.