The Colt 1911 Defender/Officer Magazine is a standard factory replacement magazine. This magazine is for 1911 Models chambered in .45 ACP and holds 7 rounds of ammunition. It is made from high quality stainless steel with a steel follower and polymer base plate. The exterior of the magazine features a silver finish. Additionally it is worth noting that the magazine is made to Colt's specifications and tolerances using the same manufacturing process and materials as the original equipment magazines which shipped with your firearm. This will ensure not only a perfect fit but exceptional operation.