Armscor Pistol Magazine, 45ACP, 13 Rounds, Fits 1911 Pistols, Steel, Blued Finish 54171 This ACT MAG 1911 Full Size Double Stack Magazine is manufactured to exacting tolerances in Italy. This magazine is for the High-Cap Armscor/Rock Island Armory A-2 1911 models chambered in 45 ACP and holds 13 rounds of ammunition. It is constructed of steel and is made to Armscor/ACT MAG specifications and tolerances" using the same manufacturing and materials as the original equipment magazines" ensuring perfect fit and operation.