1 in 7.....here's a quote from a test report on my rifle.......
"Jeff Hoffman, the honcho at Black Hills Ammo, recently sent me some of his military-contract 5.56mm Mk262 Mod 1 ammunition (77 grain OTM), claiming it was slightly more accurate than the 52 grain load — only in fast-twist barrels, of course. From this Colt carbine, the two loads were a statistical tie for accuracy, with three-shot groups hovering around ½ inch center-to-center at 100 yards. This mil-spec 16-inch carbine produced ½ MOA accuracy using a 4x optic, despite having to fight my way through a 7+ pound mil-spec trigger with a huge amount of gritty creep before the let off. With a match-grade trigger and sniper-grade 10x optics, this Colt carbine should approach ¼ MOA accuracy, rivaling my .223 bolt-action sniper rifle."