The Magpul PMAG 10LR/SR .308 Win GEN M3 20RD Magazine in black is optimized for SAAMI-spec 7.62x51/.308 Winchester ammunition. This high-qulity Magpul .308 Win 20RD Magazine with true 10-round compacity does not require limiters, pins or rivets. Next-generation impact and crush resistant polymer construction and Constant-curve internal geometry make this PMAG extremely smooth feeding, reliable, and durable. Other features on the Magpul PMAG 308 Win M3 20RD Magazine include Anti-tilt, self-lubricating follower, High-quality stainless steel spring, and a Flared floorplate.