I was really expecting less, but Otis over delivered. Here are some things you need to know. When cleaning the firing pin, it won't 100% clean it, I still go over it with a brush & then rub it off with a patch, but it still got most of the carbon off. When cleaning the "bolt housing" I was amazed at how much carbon it got out. I had to clean the Otis bone tool before inserting it back in. It really does a good job at cleaning the actual "bolt housing." I ran fresh patches as well to also get the residue that was left behind. It did a really good job at also cleaning the "bolt" where the firing pin goes in, it cleans off most of the carbon, but you may need to use a patch to clean what remains. This tool really makes it a lot easier to clean the bolt carrier group. It will do the hard work for you, but you still need a cloth/patch to finish the job. I also left the parts soaking in REM oil to loosen up the carbon, use common sense. Fyi you need to apply pressure, put your back into it when scraping the carbon off, pretty much with anything in life. Lol. If you're expecting this product to cure the cancer in your rifle you're going to be disappointed, but if you got the balls to know how to clean your rifle this tool really does a great job. A+Read full review
Verified purchase: Yes | Condition: New
With all the different tolerances this tool is a good idea...but fails because of all the tolerances. It is way too small for some parts or too snug for others. I clean AR's as part of my job, and I thought this would help. I ended up having to wrap patches around it to make any use of it. It is well made...but its a gimmick, not a real "tool."
Verified purchase: Yes | Condition: New
It is perfect! That's all i can say! Over-engineered! This little tool, using it correctly will last forever! It does a great job scraping the firing pin, extremely easy if you compare it to the rest of the tools sold for this purpose. It is the right design for that specific need.
Verified purchase: Yes | Condition: New
This is a quality product. All the features were very well thought out and easy to use. It is as effective as advertised. It makes cleaning out difficult places very easy.
Verified purchase: Yes | Condition: New
The 5.56 model fit inside the pistol grip. Its easy to use , but it doesn't scape everything off the bolt. Cleans the inside of the carrier awesome. As far as the firing pin scraper, I've never gotten my gun so dirty the firing pin needed to be scraped. Or maybe my firing pin just stays lubed well enough that carbon doesn't burn on. Anyways I definitely recommend this tool. Adds maybe a minute to my cleaning and like I said it fits in the pistol grip.
Verified purchase: Yes | Condition: New
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