MAG ACT-MAG 1911 A2 40SW/10MM 16RD This magazine is for Rock Island Ultra 1911 models chambered in 40 S&W or 10mm and holds 16 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... MSRP: Was: Now: $29.82 Add to Cart