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.