Tech Tip: BRN-9 Upper Disassembly, Maintenance & Reassembly
This guide details the field stripping, maintenance, and reassembly of the BRN-9 upper receiver. It covers removing the bolt assembly, charging handle, and firing pin, along with lubrication points and reassembly steps. The video emphasizes the unique internal buffer system of the BRN-9, which contains the recoil spring and weight within the upper receiver.













