Auto Ordnance Rifle Magazine, 30 Carbine, 10 Rounds, Fits M1 Carbine Rifles, Steel, Matte Finish, Black MC3010 This Auto Ordnance M1 Carbine magazine is designed to hold 10 rounds of .30 Carbine ammunition and is made of steel. It is a factory replacement magazine which will ensure reliable fit and function in your Auto Ordnance M1 Carbine.