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Questions & Answers
Do you use the 30 caliber brake for 6mm and 6.5 caliber?

Yes. .30 is the closest to 6mm and 6.5mm. I use a .30cal 2 port brake on my 22" 6mm ARC AR and the recoil is almost gone when shooting off a tripod and rear bag while prone. Only downside to a good brake is the concussive blast, not to bad on a 22" barrel. I used the same brake on a 10.5" 300BLK pistol and didnt get through the mag before putting the can back on.

by Guywitha6arc, Verified Owner, November 27, 2025
Customer Reviews
Expert Review
No more timing!! by Claytonian, Gear Expert, September 23, 2025
Decent brake, I like it. However, the self timing part it AMAZING! No shims, no timing.... no more nicking the barrel while trying to install/reinstall. Just put the first nut on, then twist on the brake - works amazing!
Most Recent Reviews
I have not used this muzzle brake yet. I fully expect it to work as advertised.
Most Recent Reviews
Poorly machined by Kim, Verified Owner, October 20, 2025
Huge stepover machining defect on the bottom. Some of it is machined nicely, some poorly. It was also packed poorly (plastic bag inside single wall plastic shipping bag); big scratch through finish on front and I don't know if that was from packing ...
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Product Info for Kaw Valley Precision OPMOD Self-Timing Muzzle Brake

The OPMOD Kaw Valley Precision Self-Timing Muzzle Brake is available exclusively at OpticsPlanet. These Muzzle Brakes & Compensators feature an integral jam nut for quick, user-friendly installation and precise timing without the use of shims or crush washers. Reducing heavy-duty recoil and muzzle rise has never been easier; just install the nut, lock in the muzzle brake, and experience consistent performance shot after shot. The high-strength steel construction and nitride finish ensure maximum durability and a long lifetime of rigorous use. Get your own OPMOD exclusive Kaw Valley Precision Self-Timing Muzzle Brake today for a simple solution to recoil management.image

Specifications for Kaw Valley Precision OPMOD Self-Timing Muzzle Brake:

Manufacturer: OPMOD
Color: Black
Outer Diameter: 1.02 in
Length: 2.35 in

Features of Kaw Valley Precision OPMOD Self-Timing Muzzle Brake:

  • Two-Port Design – Reduces recoil and muzzle rise
  • Self-Timing – Integral jam nut allows quick, precise alignment without shims or crush washers
  • 17-4 H900 SS – Chosen for strength and durability in hard-use applications
  • Black Nitride Finish – Corrosion-resistant and a low-glare
  • Lightweight Performance – Heavy-duty braking power in a compact package

Package Contents:

  • Kaw Valley Precision OPMOD Self-Timing Muzzle Brake

Kaw Valley Precision OPMOD Self-Timing Muzzle Brake Orderable Models

List of Orderable Models

  • OPMOD Kaw Valley OPMOD Self Timing Muzzle Brake, Black, 1/2x28, KVP-OPMOD-STMB01 , MPN: KVP-OPMOD-STMB01 , UPC: 793888393660 , Code: 99-BMB-OPMOD-AA4GS-KVP-OPMOD-STMB01
  • OPMOD Kaw Valley OPMOD Self Timing Muzzle Brake, Black, 5/8x24 Threads, KVP-OPMOD-STMB02 , MPN: KVP-OPMOD-STMB02 , UPC: 793888393769 , Code: 99-BMB-OPMOD-AA4GS-KVP-OPMOD-STMB02
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