223 Caliber/5.56 Chamber Brush

You really need this to do a good cleaning...

Very handy brush. Works well to loosen up all the chamber fouling so it can be cleaned out with a bore snake and an AR cleaning star. I just squirt some Zippo fluid on it, push it in, and rotate it a few times around (Zippo fluid is a decent solvent that evaporates without residue, so you don't have to work hard to then clean out the solvent you just used). The one thing to know is that it fits tightly in the chamber, so you can't just spin the cleaning rod with your fingers. If your cleaning rod has a fixed handle at the end that will work. If the handle spins, you'll need something to grip the cleaning rod so you have enough torque to rotate it. I clamp a pair of vise grips to the cleaning rod and then just rotate the vise grips. Works out great. I don't fault this product for that drawback, so much as the makers of most cleaning rods.

This brush is definitely the same quality I have come to expect from Otis, which is top notch. This brush cleans those very difficult nooks around the chamber very well. I have used this brush for around 200 passes through my AR now and it is still looking like new. I will note that you do need a rod, the Otis pull through system just does not have enough tensile strength to get this all the way into the chamber easily. So if you only have an Otis puck system be sure to build a rod into your cost (a short handgun rod works great). It is a specialty brush and it does cost a lot for what it is, but it works well and it seems like it is going to work for a long time as well. 5 Stars.

This is a top of the line brush from Otis for cleaning the chamber on your M4 .223/5.56. The chamber can be difficult to clean without using the proper tool and a cleaner chamber will help prevent future problems. Save your Q-tips for your ears and spend a couple extra dollars and buy the best chamber brush. I use my pistol cleaning rod because its stronger and works well with this brush. I have to give this high quality product 5 stars.

We have used star pads for cleaning the chamber in the past, but wanted to get a bit more aggressive with the build-up. This seemed like just the right additional to our cleaning kit based on reviews. I have the right rod set, cleaners and lube. It is a good tool for the purpose, the bristles do work well to break loose the deep seated grime, but this chamber brush is not perfect. It is incredibly tight, so much so that I worry about marring. Afterwards I noticed several copper bristles left behind in the chamber, laid down tight in the crevices such that a pointy pick was needed to get in there and lift an end allowing tweezers to lift the bristle out. That was an unexpected pain; hopefully that will not be commonplace as the bristles break in a bit and become easier to use. Cleaned well. Had a few issues. Might get better with time. Will come back and revise review if future applications do not show improvement over first use.