an extender for a bolt catch release lever on a bolt catch operating lever of a firearm equipped with a protective spare magazine carrier for holding a loaded spare magazine in a position of readiness for immediate insertion into operative engagement with that firearm , and an integrated bolt catch and extended catch release lever . the extended bolt catch release lever places an engagement contact face of an outer end in a position accessible for easy operation of the bolt catch release mechanism of a rifle when the spare magazine carrier is in place .