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Can't remove Muzzle Brake off of Ruger Gunsite

MMH

Sergeant
Full Member
Minuteman
Mar 17, 2013
332
58
I just purchased a Ruger Gunsite in 450 Bushmaster. I cannot remove the muzzle brake. I had the barrel clamped hard in a vise. Admittedly, it was between two 2x4s but clamped down very hard. Was putting plenty of torque on it w/ an open end wrench. Hard to estimate but would guess every bit of 60 ft-lbs. Are there any tricks in removing these muzzle brakes? Called Ruger and they just said send it in, but don't want to be out of the rifle for 6 weeks.
 
Also, it's probably gonna take way more than 60 pounds of torque. Hit the end of the MB with a hammer first.
OK, will try, but putting an open end wrench on it - not ideal for exerting great amounts of torque or impact. Will heat up MB w/ propane torch & smack MG w/ hammer. Don't care if I F'up the MB but do not want to damage the barrel. Can I really crank down the vise on the wooden blocks w/o worrying about barrel damage - it's a fairly good size vise (8" jaws mounted on a welding table).
 
The nut turns towards the action, and the rest of the brake, off the muzzle end. It is a jam nut.

A proper fitting wrench on the nut and something through the big gaping hole in the brake worked on an RPR for me.
 
Don't be afraid of the heat.

Blast it with the propane torch. If it glows red it is too much.

Twist brake off. If it has a jam nut make sure to loosen that first. You will need more than 60 ft lbs. It is not uncommon to exceed 100 If the monkey really put it on well at the factory.

Shock helps.