i've got a 14.5" bbl coming to finalize my latest AR build, 5.56x45. i'm HOPING to put a PWS CQB Comp on my rifle, figuring a way to permanently attach it, and having fun. that's this muzzle device, btw: CQB Comp, 1/2x28 threads, .223, retail packaging anyhoo, it was brought to my attention...