Magpul PMAG D-50 GEN M3 Black Drum 50rd polymer drum magazine for 7.62x51 NATO/.308 Winchester ammunition used in SR25/M110 pattern rifles. Compatible with longer-than-SAAMI-spec match ammunition up to 2.830 OAL, such as M118LR. Built to Magpul PMAG standards for high-capacity performance and reliability.