MRAT Compensator Kit for FNX-45

Description

The MRAT Compensator Kit for the FNX-45 is built for shooters who want to keep their rounds on target, shot after shot. Designed specifically for the FNX-45 platform, this direct thread-on compensator reduces muzzle rise by 40-60%, depending on the ammunition you run. That means you stay on target faster, with less effort, and more control over every follow-up shot.

Living on the Florida coast means humidity, salt air, and constant exposure to the elements. That’s why this kit features a durable, corrosion-resistant finish. The FDE color option uses Cerakote Magpul FDE H-267, a coating that holds up against sweat, rain, and coastal conditions. You can carry or store this kit without worrying about rust or wear eating away at your investment.

The kit includes a captive-spring guide rod assembly, which is necessary for proper function with the compensator. The reduced slide velocity from the MRAT design requires this setup to cycle reliably. The spring retaining nut is removable, so you can swap springs and fine-tune the action to match your preferred ammunition. Whether you shoot light target loads or +P duty rounds, you have the flexibility to dial it in.

We tested this kit with a wide range of SAAMI Spec ammunition—from the lightest practice rounds to full-power +P loads. Hand loads that fall below SAAMI pressure specifications may cause malfunctions, so stick with factory ammunition for consistent performance.

Key benefits you’ll notice at the range:

• Reduced felt recoil — Less punch in the hand means you shoot longer with less fatigue.
• Reduced muzzle rise — The comp redirects gas to keep the barrel flat, so you’re not fighting the gun back on target.
• Faster sight return — After each round, the front sight snaps back to where you aimed, not somewhere in the sky.
• Integrated wings — The comp body includes wings that cover the gap between the slide and compensator, giving the gun a streamlined, finished look.
• Distinctive appearance — This kit gives your FNX-45 a custom look that stands out from the crowd. It’s not something you see on every gun at the range.

Fitment and specs: This kit is a direct thread-on design for the FNX-45. No adapter plates or custom fitting required. The compensator threads directly onto the factory barrel. The included guide rod assembly replaces the factory unit and is tuned for the reduced slide velocity. If you need to change springs later, the