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GrovTec US Jam Nut Muzzle Devices
$8.11 $7.99
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Great jam nut to get fill in gap in barrel threads

by Gene, Verified Owner from TX, United States Written on January 30, 2026
Yep, I’m Gene. I realized I wrote my review of the UTG grip and light combo here in error. I did also purchase this Grovtec jam nut to take care of a gap between my Griffin Armament suppressor adapter and the shoulder on my MPA Defender’s barrel. It worked great for that purpose. 1/2x28 threads are nice and clean and it fit with no issues. It is a hair over two tenths of an inch in thickness.
Would recommend: Yes
Was it helpful to you? Yes | No

Excellent light and grip.

by Gene, Verified Owner from TX, United States Written on January 30, 2026
This is a very well-made grip and light module. The grip itself feels very similar to a Magpul or BCM grip, but it has the added benefit of an excellent built-in light. The light is advertised as having 400 lumens. I believe that is accurate, as the light is very bright (especially inside structures) and compares well with Inforce and Streamlight products I also run. The momentary strobe buttons are excellent, and the rear-mounted constant on and off is well-placed.
Would recommend: Yes
Was it helpful to you? Yes | No

perfect for timing my Brake

by Jim, Verified Owner from FL, United States Written on March 9, 2024
The muzzle brake I got just wouldn’t line up with a crush washer so I got this and it’s perfect. It takes a little time to get the torque right while trying to keep the alignment right but it’s there and works perfectly
Would recommend: Yes
Was it helpful to you? Yes | No
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