Full-featured, stock-length, fixed-base magazine; Made to the same exacting tolerances as the high end POWER MAG series; Die-controlled tolerances are held to +/- .001" which is more than 75% tighter tolerances than magazines made to military specifications; Springs are made from aerospace-grade wire; Large view holes and numbers allow you to quickly determine how many rounds are in the magazine at a glance; Stainless Steel Finish