Description

HK Parts Railok™ Mounting System Threaded Barrel Compensator: H&K HK45

The HK Parts Railok™ mounting system compensator strikes a seamless balance of form and function. Users will immediately notice the reduction in muzzle flip and recoil, getting you back on target quicker. Utilizing our proprietary railok™ mounting systemlocking system, this compensator takes mere seconds to lock into the perfect position on the pistol’s picatinny rail.

HK Parts compensators are CNC machined in the US from billet aluminum and Cerakoted for a sleek, enduring finish.

Compatible With:

HK45

Specifications:

Length: 4 14/16 inches
Height: 2 inches
Weight: 6.80 oz.
Crafted from aircraft-grade billet aluminum and finished in durable Cerakote.
Torque:
- Side Screw - 18 inch-lbs

DISCLAIMER: Improper installation of an HK Parts pistol compensator WILL result in damage to both the compensator and the firearm. It is imperative that our detailed instructions are systematically and carefully followed. HK Parts is not liable for any damage to the firearm or compensator in the event that our compensator was improperly installed. Please refer to the installation video under the "INSTALLATION VIDEO" tab just above this description and reach out to us if you have any questions or concerns about your installation. We are more than happy to help!

Note: HK Parts recommends using 124+ grain ammunition for 9mm and 180+ grain ammunition for .40 S&W for optimal performance.

*DO NOT USE COMPENSATOR WITH A THREAD PROTECTOR INSTALLED ON THE BARREL. Doing so will result in damage to your firearm and compensator.*

***Railok Compensators are designed to fit tightly on your firearm's picatinny rail. Please note that the installation and removal process may cause marring on the picatinny rails of newer firearms.***

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Videos

RAILOK™ Compensator Installation Video | HK Parts

Many of you have been asking for a compensator without the rai...

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Additional Information

FIREARM MODEL(S):	HK45
CALIBER:	.45 ACP
COLOR:	Black
ORIGIN:	USA

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2 Reviews

5
HK45 Railok

Posted by Patrick Milloy on 30th Apr 2026

I attached this to a HK45T. It dropped the recoil about 30%. I shot 200 grain handloads @ 720 PFS and it was very mild. I crushed my left hand and have no strength but shooting was fun again. Yes fun. The comp fouled the front sight after about 30 shots but it wiped right off. Bullseye and Unique. The extra weight kept the front sight on target. I shot very well and I am 76 and age doesn't favor old guys. I go out hiking in Wyoming, Montana where they have some serious animals. This is perfect with hard cast because of the weight and 11 rounds. Most 44 mags feel like 40 lbs with limited air up in the Rockies after about an hour. Buy it. It's like owning two great guns. Yes, you will notice the difference. And no I am not getting paid.
5
HK45 Railok

Posted by Patrick Milloy on 30th Apr 2026

I attached this to a HK45T. It dropped the recoil about 30%. I shot 200 grain handloads @ 720 PFS and it was very mild. I crushed my left hand and have no strength but shooting was fun again. Yes fun. The comp fouled the front sight after about 30 shots but it wiped right off. Bullseye and Unique. The extra weight kept the front sight on target. I shot very well and I am 76 and age doesn't favor old guys. I go out hiking in Wyoming, Montana where they have some serious animals. This is perfect with hard cast because of the weight and 11 rounds. Most 44 mags feel like 40 lbs with limited air up in the Rockies after about an hour. Buy it. It's like owning two great guns. Yes, you will notice the difference. And no I am not getting paid.