
BRT OPTIMUM 16" Upper Receiver Group
Barrel: BRT OPTIMUM LPR 16", MPR 16" or SPR 16"
Gas System: BRT EXT, extended intermediate length optimized for 16"
Hand Guard: 12", 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.