We continue to receive customer requests for an SBR Version of our P50®/R50®. Well here it is! The new R50® DEFENDER is the Short-Barreled Rifle version of our new R50®. It has a 9.6 Barrel the R50® side folding stock along with the flash hider from our RDB17/RDB DEFENDER and chambered in 5.7x28mm. – DESCRIPTION: BLACK FINISH 50RD MAGAZINE SHORT BARRELED RIFLE