+3 BRT 12.5" OPTIMUM Upper Receiver Group URG-12.5-HFCL $715.00 Out of stock Quantity: 1 Add to Bag Product Details BRT 12.5 OPTIMUM Upper Receiver Group Barrel: BRT OPTIMUM 12.5" HF CL or BRT OPTIMUM 12.5" SR CL Gas System: EXC Length, Optimized for 12.5" Hand Guard: 11.5", 11.6" or 11.7" M-LOK rail. Upper: Forged from 7075 USGI M4 Upper w/ dry film lube. Upper is test fired before shipping. NFA Rules Apply 100% made is USA. Save this product for later Favorite