The ProMag FNX-45 .45 ACP 20-round steel magazine is a high-capacity reload solution for shooters running the FN FNX-45 platform. Whether you're stocking up for the range, duty use, or home defense, this magazine delivers reliable feeding in a rugged steel package that's built and assembled right here in the USA. With 20 rounds of .45 ACP capacity, you're doubling typical factory mag counts—a serious advantage when round-count matters.

ProMag engineered this magazine with the same attention to detail you'd expect from American-made ammunition components. The magazine spring is precision wound from heat-treated chrome silicon wire, a material chosen for consistent spring life and reliable feeding across thousands of cycles. Every assembly step is inspected and double-checked to ensure each mag meets the same quality standard, so you're not gambling on a weak link in your firearm's reliability chain.

The steel construction keeps weight reasonable while delivering the durability shooters expect from a duty or training magazine. The straightforward design feeds .45 ACP rounds reliably and strips easily when you need fast reloads. Add a couple to your kit and you've got flexibility for longer range sessions or backup capacity when it matters. ProMag backs this magazine with a lifetime guarantee against manufacturer defects, so you can run it hard without worrying about premature failure.

The ProMag FNX-45 .45 ACP 20-round steel magazine is a high-capacity reload solution for shooters running the FN FNX-45 platform. Whether you're stocking up for the range, duty use, or home defense, this magazine delivers reliable feeding in a rugged steel package that's built and assembled right here in the USA. With 20 rounds of .45 ACP capacity, you're doubling typical factory mag counts—a serious advantage when round-count matters.

ProMag engineered this magazine with the same attention to detail you'd expect from American-made ammunition components. The magazine spring is precision wound from heat-treated chrome silicon wire, a material chosen for consistent spring life and reliable feeding across thousands of cycles. Every assembly step is inspected and double-checked to ensure each mag meets the same quality standard, so you're not gambling on a weak link in your firearm's reliability chain.

The steel construction keeps weight reasonable while delivering the durability shooters expect from a duty or training magazine. The straightforward design feeds .45 ACP rounds reliably and strips easily when you need fast reloads. Add a couple to your kit and you've got flexibility for longer range sessions or backup capacity when it matters. ProMag backs this magazine with a lifetime guarantee against manufacturer defects, so you can run it hard without worrying about premature failure.