The Fortis Billet Mag Catch & Button is a superior alternative to the ones found in a mil-spec lower parts kit. Easily installs in seconds and instantly upgrades your rifle. This upgrade is CNC machined from a solid piece of 6061-T6 aircraft grade aluminum or 303 Stainless Steel. Fortis Manufacturing added texture and an engraved logo for just the right touch of function and styling. Magazine rod is 303 Stainless Steel for further added durability. IncludesMag ButtonMag CatchMag Catch RodMag Spring 17-7 SS FeaturesSame low profile as a mil-spec magazine buttonLow profile prevents from over-throwing the magazine catchFull aggressive front serrations while having full-length threaded internalsUltra lightweight