The Match Grade 1911 magazine from CMC is a traditional USGI-style fixed base magazine with improvements in follower design"" feed lip geometry"" and materials. Match Grade die-controlled tolerances are held to +/- .001"" which is more than 75% tighter than magazines made to typical military specifications. Springs are made from aerospace-grade rocket wire and large viewing holes are numbered to quickly determine round count at a glance. The stainless steel Match Grade mag features a welded base plate for the ultimate in durability.