MRAT Compensator Kit for FNX-45

Description

The MRAT Compensator Kit for the FNX-45 is a direct-thread compensator designed to make your follow-up shots faster and more consistent. By redirecting propellant gases, this compensator reduces muzzle rise by 40-60%, depending on the ammunition you run. That means you spend less time fighting the gun back on target and more time putting rounds where you need them, whether you’re working a stage or confirming your zero at the range.

This kit includes a captive-spring guide rod assembly that is absolutely necessary for proper function. Because the MRAT reduces slide velocity, the factory guide rod won’t cut it. The included assembly ensures your FNX-45 cycles reliably with the comp installed. The spring retaining nut is removable, allowing you to swap springs for further tuning if you want to dial in the feel for your specific load or shooting style.

We tested this kit extensively with a wide range of SAAMI Spec ammunition—from light target loads all the way up to +P duty rounds. It runs clean and consistent with factory ammunition. Important: Hand loads that fall below SAAMI Spec pressure levels may cause malfunctions, so stick with quality factory ammo for best results.

Key benefits you’ll notice immediately:

• Reduced felt recoil — less push in the hand means less fatigue over a long range session or training day.
• Reduced muzzle rise — the comp directs gas upward to keep the muzzle flat, so your sights stay on target.
• Faster sight return — after each round fired, the front sight drops back onto the target quicker, letting you shoot faster with better accuracy.
• Streamlined profile — the wings on the comp body cover the gap between the slide and the compensator, giving the pistol a clean, integrated look that stands out.
• Unique appearance — this kit adds a custom look that you won’t see on every FNX-45 at the range or in the safe.

Fitment and finish details: This kit is designed specifically for the FNX-45. The compensator threads directly onto the barrel (no adapter needed). Note that the FDE finish color is currently Cerakote Magpul FDE H-267 for a durable, low-glare coating that matches popular gear setups. Price is $175 for the complete kit, including the compensator and captive-spring guide rod assembly—no extra parts to buy.

If you carry concealed, hunt, or shoot competitively, this compensator kit gives you a practical edge: less muzzle flip, faster follow-ups, and a reliable setup that works with the ammunition you