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Reviews & Ratings for GG&G HK USP Slim Line M3/M6 Mount — 8 reviews

(8 reviews)
GG&G HK USP Slim Line M3/M6 Mount
GG&G HK USP Slim Line M3/M6 Mount
$69.85 $55.39 Save 21%
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Most Helpful Positive Review Great Option When There Aren't Many
Adapter is made very well and very easy to install. The downside is that GG&G states that the new SureFire Ultra (and Turbo) models will not work with this adapter. GG&G states on their website that it will void the warranty.
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rail mount for USP

by arlo, Verified Owner from AZ, United States Written on October 28, 2025
If you're wanting to put a modern light on a HK USP, this is what you want ��
Would recommend: Yes
Was it helpful to you? Yes | No
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The only real choice

by GB, Verified Owner from TX, United States Written on May 24, 2025
The only real choice to convert your HK USP proprietary rail to Picatinny. There is another product out there, but this one appears sturdier. No issues attaching this piece to the USP, and no issues attaching various TLRs to it. I recommend this one without reservations.
Would recommend: Yes
Was it helpful to you? Yes | No
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Great product

by Bg, Verified Owner from MA, United States Written on May 20, 2025
Works as intended. After installing this mount I was able to install my choice of lighting options for my USP.
Would recommend: Yes
Was it helpful to you? Yes | No
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Works great with the Olight Baldr Mini flashlight

by laem, Verified Owner from bangkok, Thailand Written on December 3, 2024
It can be installed firmly without any shaking. The adapter is thin so that the flashlight does not drop too low above the trigger housing.
Would recommend: Yes
Was it helpful to you? Yes | No
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The best choice

by Tim, Verified Owner from NC, United States Written on May 28, 2024
Works perfectly but, depending on what light you use, it may sit a little too far forward. I have the TLR-1 and have a hard time reaching the switch with my dominant hand.
Would recommend: Yes
Was it helpful to you? Yes | No
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HK40 Full Size

by Uncle Mike, Verified Owner from TX, United States Written on March 10, 2024
Fits perfect! Works well if you want a laser or light or both on your full size hk! I was able to mount a cheap light off of amazon and it fits nicely. No wobble. Definitely recommend to anyone with a full size hk usp!
Would recommend: Yes
Was it helpful to you? Yes | No
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Works great!

by Rlau, Verified Owner from OR, United States Written on September 13, 2023
Good fit, allows use of standard picatinny rail accessories. Well made, fits tightly to a USP 45. Cut out to allow the serial number to still be visible, which is nice. Accessories hang slightly lower than they would on a integrated picatinny rail, but still very usable.
Would recommend: Yes
Was it helpful to you? Yes | No
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