Quick view CMMG CMMG 55A080B-SG DISSENT BR4 556 14.5 P&W SNPGRY $2,172.25 $1,706.77 The BR4 features a 14.50" the ZEROED SVD muzzle brake is pinned & welded to the muzzle, bringing the barrel's OAL to 16.10". Combining traditional controls and ergonomics together with modern engineering, there's an adjustable gas block gives you... Compare Add to Cart