AR .308 .750 JAM NUT 5/8-24' Reviews & Ratings

High quality hex jam nuts for indexing muzzle devices. Available in black or stainless steel for 5/8-24 threads.

SPECS: .200 thick. Requires use of thin wrench to tighten against brakes and comps.

View Product

Write a review

5 Stars

100%

4 Stars

3 Stars

2 Stars

1 Stars

Reviews Summary

Customers love the AR .308 Jam Nut for its quality and ease of use, often noting how it simplifies the installation of muzzle devices like brakes and suppressors. It is reusable, provides excellent alignment, and has a durable finish. Many recommend it as superior to traditional shims and crush washers, making it a worthwhile investment.

What Reviewers Are Saying

Ease of Installation

71%

Many users highlight the straightforward installation process, emphasizing how the jam nut simplifies aligning muzzle devices without the hassle of shims or crush washers. Its user-friendly design enables quick setups, often completed in seconds.

Product Quality

86%

Reviewers consistently praise the high quality of the jam nut, complimenting its solid threads and durable finish. This robust construction instills confidence in its performance and reliability for various installations.

Time Efficiency

71%

The jam nut proves to save users significant time compared to traditional methods. Customers appreciate how it eliminates the need for multiple adjustments and makes clocking devices fast and efficient.

Reusability

43%

The reusability feature of the jam nut is frequently mentioned, with users valuing the cost-effectiveness and sustainability it offers compared to disposable crush washers or shim kits. This aspect is a significant draw for many purchasers.

Aesthetic Appeal

43%

Several reviewers comment on the attractive matte finish of the jam nut, noting that it complements their rifles aesthetically. This visual aspect is appreciated alongside its functionality, making it a favored choice.

Sort by Filter by rating

Perfect Solution

I ordered this Jam Nut for a Howa 1500 mini in 6.5 Grendel. I used it to clock the brake I wanted to install. It worked perfectly.

by CRAIG LYMAN on April 26, 2024

Verified Purchase

Was this review helpful? 0

Jamb Nut Spacer

Installing a Area419 Sidewinder muzzle brake needed a quality .200 spacer on threaded rifle barrel. This jamb nut fit tight and flat with no change in shooting accuracy!

by Michael Manhart on February 07, 2024

Verified Purchase

Was this review helpful? 0

Bee's Knee's

Obviously anything on Brownells I trust. This is the way to go when installing muzzle devices. Forget fussing around with shims. Do a YouTube look up and confirm how easy jam nuts are to use. Installed my suppressor adapter in 15 seconds! High quality threads and finish.

great product

It does what it is supposed to. Very happy with this purchase. I was able to line up muzzle brake with no problem.

Works great

Ordered a precision armament brake and a shim kit. While the shim kit worked it took forever to get the correct timing on the brake. I didn't really like the look of it. This JP jam nut was faster and looks better in my opinion. Would buy again.

WOW

These are great. No more vise blocks to remove the barrel device. No more put it on, take it off to clock it. Uses a 3/4 wrench so it is the same diameter as my flash hider. Has a nice matte finish that did not scratch during install on 3 rifles. I will be getting some in 1/2" soon. You will not be disappointed.