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Promag FN FNX-45 45ACP 20 Round Magazine
This is the Promag FN FNX-45 45ACP 20 Round Magazine. This FN FNX-45 steel magazine, manufactured by Promag Industries, holds up to 20 rounds of .45 ACP ammunition.

This Promag FNX-45 extended magazine has a steel construction with a grip extension, providing comfort and steadiness at the range. Also, it offers an anti-tilt polymer follower, steel feedlips, and a precision-wound steel spring for consistent and reliable feeding into your FN FNX-45.

Promag prides itself on making their products in the USA, where each and every step of the assembly process is checked and double checked in order to maintain the same consistent level of quality.

Pick up a few of these Promag FNX-45 45ACP 20 Round Magazine from the Mag Shack!



More Information about the FN FNX-45 Handgun

The FNX™-45 is the result of years of innovative product development and advanced engineering techniques. Modeled after the FNP™-45 service pistol introduced in 2007 under the U.S. Joint Combat Pistol Program, the FNX™-45 is a double-action/single-action hammer-driven pistol with highly enhanced ergonomics. Its manual safety/decocking levers, slide stop lever, and magazine release are all fully ambidextrous for ease of operation with either hand and from any firing position. Both the slide and barrel are stainless steel. The FNX™-45’s checkered polymer frame has multiple interchangeable backstraps with lanyard eyelets. A MIL-STD-1913 mounting rail on the underside accepts tactical lights and lasers.


Weight 6 oz




Customer Reviews

Based on 85 reviews
William G.
FNX 45 magazine

All I can say is fantastic. The 15 round mags are authentic FN so they work perfectly. I was a little worried about the 20 round mags however. But after I cycled them through, I couldn’t tell the difference between them and the factory FN mags. Super satisfied. Shipping was very quick. Very pleased and will certainly order from here again in the future!


Can this clip go into a single stacked 45 acp 3.3???

Karl H.
Perfect fit

The new magazine is great, a perfect fit. But what is more impressive is the company itself! We all know that the US postal service is achingly slow, but this magazine arrived quite quickly . Great job

Greg W.
Fast delivery

Have not used them yet but look like well made

robert m.
Fn45 mags

They work as they should and give you 20rds of 45 cap.

Promag FN FNX-45 45ACP 20 Round Magazine Promag FN FNX-45 45ACP 20 Round Magazine
Promag Magazines

Promag FN FNX-45 .45 ACP 20 Round Extended Magazine


Availability: In stock

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