Guncrafter Industries very own .50 GI Magazine. Fits M1, M2, M3, or M4, 7 Rounds with your choice of black or OD/grey base pad. GI Magazines are made of heat treated stainless steel and are of heavier gauge steel than standard 1911 mags for increased strength and rigidity. The magazines are positioned higher in the frame to increase reliability and give smoother feeding. The self lubricating polymer follower has a steel insert at the slide stop contact point for longer life. Our magazines are slightly longer in order to make room for an extra power chrome silicon spring for increased life and reliability. The base pads are machined from aluminum for light weight and durability and are designed so they can be grasped in the event that it sticks due to dirt or sand.