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CAR-15 BUTTSTOCK MIL-SPEC Reviews & Ratings

Brownells has been working on a top quality option for those looking for a buttstock for a XM177 clone or early style AR build, and have teamed up with B5 Systems to bring this stock to market. With close attention paid to every detail these Mil-Spec stocks are a rugged, durable polymer construction.

Mil-Spec
Polymer construction
Color: Black

The Brownells CAR-15 stock gives you a quality, accurate, dependable, American made option for you AR or clone build.

See all of our AR15s and AR15 parts here.

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2 Stars

Reviews Summary

The CAR-15 Buttstock MIL-SPEC receives mixed reviews. Users praise its retro design and affordability, making it suitable for vintage builds. However, some report issues with fit, wobbliness, and rough edges affecting comfort. While many appreciate the lightweight design and aesthetics, others feel the quality doesn't match expectations, particularly for hardcore enthusiasts.

What Reviewers Are Saying

Product Design

60%

Many reviewers highlight the CAR-15 buttstock's retro design and its visual appeal for vintage builds, noting its accurate representation of older models, particularly fitting the aesthetic of Colt rifles. This design aspect is strongly appreciated among users building retro-style ARs, leading to a positive sentiment.

Quality and Construction

50%

Reviews frequently mention concerns regarding the product's quality, particularly about material thickness and overall sturdiness. Comments about rough edges and mold imperfections suggest that the construction may leave room for improvement. While some users approve its functionality, others expect a higher standard for the price point.

Fit and Compatibility

45%

Several reviews focus on the variance in fit across different buffer tubes, with some users experiencing difficulties during installation and removal. This inconsistency has led to dissatisfaction among a subset of customers, who report requiring tools to fit or remove the stock, indicating possible quality control issues.

Value for Money

55%

Despite concerns over quality, a majority of reviewers feel the stock offers good value for its price. Users appreciate the affordability compared to original aluminum stocks, noting that it serves well for a lightweight or retro build while remaining budget-friendly.

Comfort and Usability

40%

A number of users express satisfaction with shooting comfort when using the stock, noting its manageable weight and secure fit during usage. However, there are mixed reports regarding comfort levels influenced by the rough edges and wobbliness, suggesting a varied experience based on individual expectations.

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CAR-15 BUILD

Just what I would expect from Brownells a quality product that will not break the bank going to look good on my car 15 build

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

by ROGER F. on September 02, 2025

Verified Purchase

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Excellent stock

Well made representation of the original CAR-15 stock

by Richard J. on October 06, 2024

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Retro B5 stock

I really like the quality and the price. It’s great to see Brownells pay attention to the Retro rifles. This stock went onto my Colt 733 clone and really looks the part.

by JOSEPH C. on December 08, 2023

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Nice stock

Very happy with this stock, fit my milspec buffer tube really good. I prefer the Doublestar aluminum stock but for the money this B5 is a good option

by Dan P. on November 19, 2023

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Awesome!

What a great stock. I’ve got multiple of these on different lowers, and they work awesome. The fit the milspec tubes I’ve used without issue. The polymer has a nice finish and the adjustment works well. I will use this again in the future! Best retro looking stock for the money.

Loving it!

Loving it! I am using it on a VLTOR A5 receiver extension. Sits flush with the extension on the 2nd position. Find it comfortable to shoulder and maneuver with. It has a good fit and finish as well. Definitely recommend for those who want to have a classic stock.

Great retro piece

Great for the money. Threw it on a retro M4 carbine build, Fits tight on some tubes, a little looser on others like any other stock. Smooth adjustment.. Minimal noise.

Economical reproduction

Looks correct on older Colt rifles. I added a John Masen recoil pad and secured it with a zip-tie. I would love an original aluminum car stock($250+). This is more than adequate for my uses(URG-I and FBI clone).

Exactly what I was looking for

This one went to a 6933 colt commando (modern) but I wanted it to retain the original look . It fit perfectly it now has the classic look and performs accordingly, manufacturing process provided a sturdy lightweight stock option , confortable to shoot and compact ,even took a carbine class and placed top 5 with iron sights (out of 30)this is a keeper and will stay on my commando permanently.

Works Great

Works great as a stand in for the original Colt Fiberlite. Wobbles less on my Colt LE6920 than the OG fiberlite.