Maxim Defense Industries PDX U.R.G. Mil-Spec Upper Receiver 300 BLK Hate Brake 5/8-24 Thread 5.5in Barrel Black MXM-47827. R.G ships with your choice of a Standard Mil-Spec BCG to be used with most common M4 compatible lowers or a PDX/SCW compatible...
Maxim Defense Industries PDX U.R.G. Mil-Spec Upper Receiver 300 BLK Hate Brake 5/8-24 Thread 5.5in Barrel Black MXM-47827. R.G ships with your choice of a Standard Mil-Spec BCG to be used with most common M4 compatible lowers or a PDX/SCW compatible...