Currently all branches of the US Military purchase match 5.56mm ammunition from Black Hills.
Firearms manufacturers use Black Hills ammunition for testing during development because they have a reputation for excellence.
Black Hills currently sell to Armalite, Beretta, Browning, Cimarron, Colt’s Manufacturing, Colt’s Defense, DPMS, Dakota Arms, Detonics, FN, Freedom Arms, GA Precision, H&R 1871, Heckler and Koch, Iron Brigade Armory, Kimber, Landtee, Lewis Machine, Marlin, McMillan Brothers, Mossberg, Patriot Arms, Robar, Rock River Arms, Savage Arms, Sig Sauer, Smith & Wesson, Springfield Armory, Sturm Ruger, Texas Brigade Armory, and Wilson Combat.