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AR-15/M16 MIL-SPEC BUFFER TUBE ASSEMBLY Reviews & Ratings

AR-15/M16 MIL-SPEC BUFFER TUBE ASSEMBLY

Precision made from 6061 aluminum, this buffer tube is the correct diameter of 1.148" to accept any MIL-SPEC carbine buttstock on the market. Hardcoat anodized to ensure a durable and long lasting finish in even the toughest conditions. All buffer tube asssembly parts conveniently packaged together for your next build.

SPECIFICATIONS:

Six position AR-15/M16/M4 receiver extension assembly
Includes Mil-Spec receiver extension/buffer tube, receiver lock plate, lock-nut/castle nut, carbine buffer and carbine buffer spring
Buffer tube is Mil-Spec diameter and 6061 aluminum
Carbine buffer weight is 3 oz
Buffer spring is 17-7 stainless steel
Hard Coat Anodized Finish
Color: Black

See all of our AR15s and AR15 parts here.

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Reviews Summary

The AR-15/M16 MIL-SPEC BUFFER TUBE ASSEMBLY generally receives positive feedback for its easy installation and solid performance. Customers praise its fitment and machining quality, especially for builds. However, some issues arose regarding quality inconsistencies, particularly with certain components. Overall, it meets expectations but varies in manufacturing quality.

What Reviewers Are Saying

Installation Ease

70%

Many reviews highlight the ease of installation as a significant advantage of this buffer tube assembly. Users appreciate that the product fits well with their builds, causing no issues during the setup process. This has led to a positive reception among DIY builders and those assembling AR-style rifles.

Quality Variability

45%

Several reviews express concerns regarding the overall quality of the product. Issues such as poor machining, inconsistent finishes, and failures of specific components like the buffer retainer were noted. This theme indicates that while some users found great quality, others faced significant problems, leading to a mixed perception of quality reliability.

Fit and Compatibility

60%

The buffer tube assembly generally receives commendations for its compatibility with a variety of stocks and receivers. Users have reported that it integrates well with different configurations, emphasizing its adherence to Mil-Spec standards, though not without some variances noted by a few reviewers.

Value for Money

50%

Many customers feel that the product offers good value for its price, especially when on sale. The performance and features relative to cost contribute to a favorable assessment, leading reviewers to recommend it as a budget-friendly option for builders.

Overall Performance

55%

The assembly is generally praised for its performance, with users reporting satisfactory function during use. While some noted concerns regarding specific issues, the majority felt that the product does its intended job effectively, thus aligning with user expectations.

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Great

This is my go-to buffer tube kit or sometimes I get just a buffer tube itself never had a problem with them and I have used quite a bit on my builds and builds for my friends

Would you recommend this? Yes, I would recommend to a friend

by ROGER FREEZE on September 02, 2025

Verified Purchase

Was this review helpful? 0

Good Parts Kit

Used this kit on my .350 legend build, works great with my B5 stock (milspec). The part was in spec, zero issues during install and testing!

Would you recommend this? Yes, I would recommend to a friend

Works Well

Needed it to finish my AR retro build. Decent quality, and was easy to install. No issues with it. Does exactly what it's supposed to do.

Great product

I needed a couple of milspec buffer tubes to replace the commercial ones i had for some new stocks. I have always gotten good products from Brownells. This was no different. They are well made and fit with no problems. Will continue to use Brownells and their products.

Buffer assembly

A well made great product. Easy to install on your lower build

No frills, solidly built.

Bought to work with a California (Thorsden) stock. Built to spec, fit and finish consistent. Threads perfectly into receiver, springs seems to be of good manufacture. Buffer solid. Finish uniform. Magpul CTR fit perfectly in trial mockup before I weepingly installed Thorsden stock. 5th Brownells buffer tube assy Ive bought from the company; no issues with any of them.

Good value, high quality

Worked well for me, together with a Hogue mil-speck buttstock. Snug fit, size per spec.

Good price, quality

This is the second of this item I have purchased at Brownells. The first is "in use" with no problems or concerns and it (expectedly) installed in my build with no problem whatsoever. The price is fair/competitive, and having Brownells' unquestioning customer support if there *was* any problem/discrepancy with the item makes it a simple decision to buy from Brownells.

Works great, excellent price.

I needed one of these kits to finish up assembling an ar15 lower. The fit in finish was perfect for my stripped Ruger lower and I had no problems with the installation and functionality. The Magpul Mil-spec stock I already had fit perfectly with no extra play or slop. I would buy another one of these kits.

Works as expected

Quality seems fine, works as expected