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5.56 B.O.N.E Bolt Carrier Assembly Cleaning Tool
5.56 B.O.N.E Bolt Carrier Assembly Cleaning Tool
5.56 B.O.N.E Bolt Carrier Assembly Cleaning Tool
5.56 B.O.N.E Bolt Carrier Assembly Cleaning Tool
5.56 B.O.N.E Bolt Carrier Assembly Cleaning Tool
5.56 B.O.N.E Bolt Carrier Assembly Cleaning Tool
5.56 B.O.N.E Bolt Carrier Assembly Cleaning Tool
5.56 B.O.N.E Bolt Carrier Assembly Cleaning Tool
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OTIS - 5.56 B.O.N.E Bolt Carrier Assembly Cleaning Tool

6 Reviews
5.56 B.O.N.E Bolt Carrier Assembly Cleaning Tool
Brownells #
668000129
MFR #
FG-246
UPC
014895000267
$29.99
Coupon Code
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Specifications
Make Model Fit:
AR-15.Universal
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What is the OTIS - 5.56 B.O.N.E Bolt Carrier Assembly Cleaning Tool?

AR owners know the importance of a clean bolt and bolt carrier group. Carbon and fouling can build-up in these areas, causing jams and malfunctions. The B.O.N.E.® Tool was designed specifically to clean the bolt carrier assembly area of 5.56 rifles.

This quick-clean tool serves four purposes- Scrapes carbon and fouling from the:

  • Bolt
  • Bolt Carrier
  • Firing Pin
  • Includes a 8-32 threaded hole to act as a T-handle

Note: While this tool fits many bolts flawlessly, it may fit some bolts better than others due to variance in bolts by different manufacturers.


For .223 cal./5.56mm Modern Sporting Rifles


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5.56 B.O.N.E TOOL REVIEWS

3.0
6 Reviews
5 Stars
33%
4 Stars
0%
3 Stars
17%
2 Stars
33%
1 Stars
17%
Reviews Summary
The 5.56 B.O.N.E TOOL has mixed reviews; while some users find it effective for heavy fouling, many others report limited success and concerns about fitting and performance. Several recommend it for specific needs, but others prefer traditional cleaning methods due to doubts about its reliability.
What Reviewers Are Saying
Product Effectiveness
60%
Reviews reflect a divided opinion on the effectiveness of the B.O.N.E TOOL, with some users praising its ability to clean heavily fouled components while others express disappointment, citing it doesn't remove carbon efficiently. This theme resonates strongly, highlighting varying experiences among users.
Design & Fit
40%
A notable number of reviews mention issues with the tool's size and fit, particularly with certain rifle models. Users criticize its diameter for not fitting properly in their Bushmaster AR-15 bolts, which indicates a design flaw that affects usability.
Traditional Cleaning Methods
50%
Several reviewers suggest reverting to traditional cleaning practices due to the tool's limitations. They believe that despite its potential, conventional methods still deliver better results for thorough cleaning, especially for stubborn fouling.
User Experiences
70%
Customer experiences vary widely; while some found success and recommend the tool to others, others decisively critique it as ineffective. This highlights the product as a hit or miss depending on the user's specific situations and bolt systems.
Gift Potential
30%
Some reviews mention purchasing the tool as a gift for friends, indicating that when it works well, it's considered a valuable addition for AR owners. This suggests that positive user experiences can make it a recommended item among firearm enthusiasts.
5
Makes short work out of cleaning
Got the .223 / 5.56 version and .308 version and they make short work out of cleaning the Carier Bolt Group (CBG) after doing a lot of shooting especially with dirty ammo. These probably aren't necessary for light shooting. Just a light wipe down with oil wipes but Deff nice to have around.
by J on January 08, 2015
Was this review helpful? 0
5
Best item for those hard to clean places
I had some build up on an AR that I built a few years ago. This tool took care of all the carbon without any CLP or solvents. I would highly recommend this to any AR owner; so much so much so that I gave these tools for Christmas presents to all my friends.
by Tom on December 28, 2013
Was this review helpful? 0
3
You can do without it
It can be useful sometimes but used too aggressively I’m not sure if it can harm or affect tolerances. So I reverted to traditional cleaning methods. Nevertheless it can be useful for heavily fouled and neglected BCGs
by Peter on March 21, 2025
Was this review helpful? 0
2
Not Good
I have tried to use this product on multiple brands of rifles, with really no success. It does not scrap close enough to get all the carbon off. All still required the standard cleaning methods to finish it.
by DevilDog Gunsmith on July 10, 2017
Was this review helpful? 2
2
All show....... No go
All promise and very little performance. Used on 2 COLT BCG's (Old green label as well as a current production model) with little success. Sorry OTIS, this one is a washout! It's going back to Brownells.
by Bucktheman on August 13, 2015
Was this review helpful? 1
View All 6 Reviews
Customer Questions
1 Question