BRT 16" Upper Receiver Group
Barrel: BRT OPTIMUM 16" HF CL or BRT OPTIMUM 16" SR CL
Gas System: BRT EXT Intermediate Length, optimized for 16"
Hand Guard: 12.6", 13" or 13.7" MLOK rail.
Upper: Forged from 7075 USGI M4 Upper w/ dry film lube.
Upper is test fired before shipping.
100% made is USA.
