This is a ProMag® 20-round magazine for DPMS LR-308 pattern AR-10 rifles in .308 Win/7.62x51mm.
Compact in size without compromising on firepower, these lightweight 20-round magazines are built from impact-resistant, textured polymer with special chrome silicon internal springs for maximum reliability. Keeping true to Eugene Stoner’s original design, the AR-10 delivers all the practical functions of its smaller rifle cousin (the AR-15/M-16) but with a hard-hitting, full-size battle rifle round. And the DPMS LR-308 pattern AR-10 is among the most flexible variants with the most available aftermarket support. These magazines meet or exceed factory standards for DPMS LR 308-pattern AR-10 rifles, delivering combat-ready performance at a price that’s hard to beat. And like all ProMag magazines, they come with a lifetime replacement guarantee.