Same exact magazine issued to the US army. No mag will give you broader compatibility. Will work with any AR-15, any NATO 5.56 rifle, plus many more. Made in the USA by a certified government contractor, D&H Tactical, Cage Code O4TQ4. Magpul Follower. Teflon gray finish inside and out. These mags are an industry standard and are utilized by Wilson Combat, Bravo Company, and countless other manufacturers. Don't let the low price fool you. This is the gold standard for an aluminum mag. Shipping is blocked to the 10 states where hi cap mags are illegal. Order 10+ and get them for $9.17 each.