The Magpul PMAG D-50 LR/SR GEN M3 is a durable, lightweight, highly reliable 7.62x51 NATO/.308 WinchesterA(R) 50-round drum magazine for SR25/M110 pattern rifles, and is capable of using longer-than-SAAMIA(R)-spec match ammunition, up to 2.830" OAL, such as M118LR. Engineered to the same exacting standards as the famous Magpul PMAGA(R) and PMAG D-60A(R) AR/M4 drum magazines, the D-50 continues the PMAG tradition of high-capacity performance and dependability. Durable and Reliable The Magpul PMAG D-50 shares its DNA with the legendary Magpul PMAG GEN M3, which includes next-generation impact and crush-resistant polymer construction and the ability to seat fully loaded on Mfg: Magpul