Modernizing a Classic: the Brownells BRN-180 Project
This guide outlines the process of modernizing a classic design using the Brownells BRN-180 Gen 2 Upper receiver. It focuses on adapting the AR-180's piston system to AR-15 lowers, incorporating modern features like M-LOK and a monolithic rail. The information is presented with technical depth, drawing on expertise from Brownells' Paul Levy and firearms historian Ian McCollum.













