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Discussion Starter · #1 ·
I installed a Bushmaster MB several months ago and have been happy with the reduced recoil and the look and feel.I was just reading some old posts about the same brake leaking gas back toward the shooter and I was thinking that it wasn't a problem for me untill a couple hours later.I had eliminated several terroist ground hogs when I noticed the residue on the underside of the barrel and front,bottom part of gas block.Reading those old posts had caused the thing to leak:D I'm not going to change muzzle brakes at this point so, I considered placing an O-ring between the barrel and brake, but I know it will not withstand the heat for very long.Hmmm.......maybe heat resistant silicone or something else heat resistant.

Also, has anyone ever checked the temperature that the barrel reaches when rapid firing.It is obviously +212 F/100 C, but how hot ?If I had one of those IR thermometers.....
 

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Hey major. I believe the silicon takes up to 500 degrees F read the label to make shure I've used it in Jet Aircraft's exhaust area no problem.

If ya sneek mama's oven thermometer and tape it tightly against the barrel, and rip a few, you can get pretty close to the temp. Now don't go tellen her I put ya up to it, or I'll get in trouble! :(

BTW, you may want to apply release agent to the barrel in case you want to remove it one day.
 

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i just bought an AK style muzzle brake from bushmaster about a week ago and haven't had the time to check it out. is this the style you bought and if so does it improve accuracy at all? how's the noise level?
 

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Personally I use locktite. But if you insist on using silicone. There is a Red Hi Temp silicone good for I believe 700 deg. you can buy it at any auto parts store. Good luck and good shooting! PS: I use this stuff under my scope rings to keep the recoil from moving the scope in the rings.
 

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Discussion Starter · #5 ·
I like the AK74 style brake, but since I shoot with open sights I haven't checked the accuracy. I never missed too many ground hogs under 100 yards without the brake, but I have noticed the rifle stays more on traget and the noise seems to be redirected away from me. I ran a ring of the red silicone inside of the brake and let it harden for about an hour before I re-installed the brake, plus I put a heavy coat of Breakfree on the barrel to hopefully act as a release agent.I'll let you all no how it seals.
 

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I installed the same brake on my Mini. It was a tight fit, and had
to tap it on. I put a heavy coat of oil on the barrel before installing, for fear of moisture being trapped between the barrel and brake. After shooting 20 or so rounds, I did notice a little film of oil on the barrel. Only went about a 1/2" away from the brake. I didn't see anything on the gas block.
 
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