AR 308 M118LR BARRELS .308 WIN HYBRID Reviews & Ratings

If you're an owner of an AR-style .308 rifle or have plans to build one, then the Criterion Barrels AR .308 Match Grade barrels are the perfect choice to enhance your latest build or buy, thanks to the company's attention to detail and drive to produce some of the best rifle barrels on the market today. Each Criterion Barrels AR .308 Match Grade barrels are machined with the company's M118LR chamber, which is capable of safely firing both 7.62 NATO and .308 Win. ammunition. The barrels are also constructed with an M4 barrel extension and are machined entirely from 416R stainless steel.

Chambered in .308 Win.
Hybrid contour
Threaded muzzle: 5/8-24 TPI
All-black finish
.875" gas block

The Criterion Barrels AR .308 Match Grade barrels are available with gas systems in either mid-length or rifle-length configurations and are designed to accept standard DPMS-style gas tubes.

View Product

Write a review

Reviews Summary

Reviews of the AR 308 M118LR BARRELS indicate a mix of accuracy experiences; many found it performs well with groups often below 1 MOA, while some struggled to achieve similar results, citing cycling issues and higher-than-expected costs. Overall, users appreciate the quality construction, though there are notable concerns about compatibility and headspace requiring additional adjustments.

What Reviewers Are Saying

Accuracy

75%

Many reviewers highlight the impressive accuracy of the Criterion barrel, with several achieving sub-MOA groups at 100 yards. However, a few users report difficulty in achieving similar results, suggesting variability in performance depending on the user or specific barrel they've received.

Pricing

60%

The price point of around $370 is mentioned by several customers. While some feel the barrel's performance justifies the cost, others express concerns about its value given their accuracy struggles.

Quality and Construction

50%

Users generally commend the quality of the barrel, noting its solid construction and finish, which withstands repeated use. However, some experienced issues like sharp feed ramps and minor defects that could affect installation and performance.

Compatibility and Installation Issues

45%

Several reviews cite challenges with compatibility regarding headspace and gas block sizing, raising concerns that potential buyers should be aware of. Some recommend purchasing a matched bolt carrier group for easier setup.

Value for Hunting and Tactical Use

40%

The barrel is recognized for its suitability for both hunting and tactical purposes, with users reporting positive experiences using it in various shooting conditions. This versatility is acknowledged as a significant strength for the product.

Customer Photos & Videos

Sort by Filter by rating

Disappointed

Bought this to replace a BA barrel which wouldn't group better than 2". After 200 rounds or so, I can't get this barrel to group much better than 2" either. I had read positive reviews about the accuracy of Criterion barrels, but that has not been the case for me. Also at $370 this barrel is quite expensive. Additionally I have had some problems getting my Aero Precision AR10 to cycle reliably with this barrel and its rifle length gas tube. It won't lock back on an empty magazine with 175 grain ammo and is iffy with 168 grain. Removing a weight from the buffer seemed to help.

by Ralph on September 05, 2025

Verified Purchase

Was this review helpful? 0

great barrel, bad parts size info!

The barrel is of high quality and a great buy. The issue i have is that in your description it says the gas block should be a .750. That is false! The .750 gas block i purchased will not fit. After looking on criterions home site i found that the correct size gas block was .875. Really don't like false descriptions that lead me to buy noncompatable parts.