jimbobborg
Oddball caliber fan
I have a nice 3-gun build, but I'd like another as a backup. I'm using the same lower, which has been flawless, unlike my current upper. So, I have a flat-top upper receiver in hand. I'd like to use this hand guard https://brigandarms.com/shop-3/brigand-quad-rail-15-2/ and this barrel http://www.ar15performance.com/inc/sdetail/11562/12294 . AR Performance sells BCGs and bolts, and if bought together with the barrel, will check head-space on the combo. or ?