Some of you may have seen my most spectacular shot last Saturday, when I almost took out a rimfire swinger array about 30 yards downrange with the flashhider/front sight assembly from my Mini-14. Had to ask Jason to call a ceasefire while I went down and retrieved it. The flash hider and sight is none the worse for the experience, but the setscrew will NOT be trusted to retain it in the future. It appears thet some type of adhesive was also used on the bearing surface (the thing was on the gun when I got it) and the heat of firing a number of rounds caused the adhesive to fail.

Thinking of using J-B weld to reattach the flash hider. I know the stuff is strong, but does anyone have a feel for how J-B stands up to extreme heat? OR, does anyone have an alternate suggestion for a permanent reattach, short of having it silver soldered on?

took off downrange like a rocket.

Whatever else you do, make absolutely certain the ID of the flashider is aligned with the ID of the bore - flashider bullet strikes are hard on accuracy AND mounting arrangements.

I have found most epoxies will either break down, soften or begin to fail about +400 Degress F. There are some high temp. epoxies, might be able to research both J.B. and what else is out there. Good Luck on your effors. As mentioned make certain nothing is obstructing the bore from the flash hider. Good Luck.

To plug a hole on his pickup's muffler. Would have worked too if the nickel had not slid off the hole. JB weld can withstand some HOT temperatures.

nm

http://www.jbweld.com/product/j-b-highheat/

probably not as high heat rated as that loctite one though.

that he used on his snub 480 Ruger to attach a front sight. He uses it at work

I would use the 620 Loctite for an AR or any other gun likely to get really hot.
The front sight on my 4 1/4" 480 SuperRed is held on by one screw and the 680 Loctite. So far it's held on nicely with no sign of separation.

Just drill a small detent right where the set screw tip contacts, (the set screw has already marked exactly where to drill) so the point of the set screw protrudes into the detent and you have a mechanical lock. This type of arraingment is called a dog point.

I'll try both the dog point and the high-temp Loctite.