Constructed of heat-treated steel and a black nitrite finish, this ProMag® magazine is built to take a beating. Whether you’re on the range doing rapid reloads or training for your next match, everything about this magazine is made for durability. Featuring an injection-molded magazine follower, you get enhanced strength and high efficiency, which means your magazine lasts longer, reload after reload without feeding or jamming. Also, including a heat-treated chrome silicon wire spring, designed for storing and reloading. So, suppose you’re always at the range running through mags of ammo. In that case, you can use this mag knowing it’ll last session after session on the range, in competition, or when your life depends on it. With less jamming and failure to feed, this is a made in the USA magazine you can trust.