Fans of piston-driven ARs now have a new option in the BRN-180 ... a spring or buffer to be installed in the shoulder stock. The BRN-180 upper ships ... Brownells BRN-180, 18.5" Barrel ...

Look for the BRN-180 upper listed under product number #078-000-483 on the Brownells website. In this article SHOT Show 2019 , Brownells , Brownells BRN-180 Upper , AR-15 , rifle , B. Gil Horman ...

The BRN-180, chambered in .223/5.56mm, is a "complete upper assembly that -- unlike the original AR-180 -- this one is designed to be absolutely compatible with any standard AR-15 lower receiver ...