Rock Island Armory 1911 TCM Stainless 22 TMC / 38 Super Auto / 9mm Luger Handgun Magazine - 10 Rounds - This magazine is made to Armscor/Rock Island Armory specifications and tolerances, using the same manufacturing and materials as the original equipment magazines, ensuring perfect fit and operation. This magazine is for Rock Island's TCM Rock Standard pistol and has a flat base and a silver finish. The Rock Island Armory 1911 Full Size Magazine is a standard factory replacement magazine. This magazine is for single stack A-1 1911 models chambered in 22TCM and holds 10 rounds of ammunition. It is made of steel and is made to Armscor/Rock Island Armory specifications and tolerances, using the same manufacturing and materials as the original equipment magazines, ensuring perfect fit and operation. Polymer base plate; T ype - Detachable;