This is a Stainless Steel 30-round magazine for AR-15 rifles in .223/5.56mm.
Improving on the classic USGI AR-15 magazine, Ammo Storage Components’ stainless steel mags offer enhanced durability and longevity that’s hard to beat. Manufactured 100% from start to finish in the U.S.A., ASC’s impressive aftermarket magazines are the perfect upgrade for your Colt-pattern AR-15/M4 rifle kit …
These standard capacity 30-round mags are built from 410 stainless alloy with enhanced, anti-tilt followers and chrome silicone internal springs for ultimate reliability and feeding. Magazines are heat-treated then chemically-treated for maximum corrosion resistance and endurance.
Optimized for shooting rounds of all kinds (including reloads), these magazines are the top choice for combat-ready AR-15 magazines at an excellent price.