Removing stuck flash hider

chindogg

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I am trying to remove a flash hider from an upper. I have the upper vice, heated it with a torch for a while and I cannot remove the flash hider for the lide of me. Anyone had this experience before and what did you do? The upper vice comes out of my bench vice when I apply enough pressure so my strength is not the issue. Any advice?
 

84ta406

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I am trying to remove a flash hider from an upper. I have the upper vice, heated it with a torch for a while and I cannot remove the flash hider for the lide of me. Anyone had this experience before and what did you do? The upper vice comes out of my bench vice when I apply enough pressure so my strength is not the issue. Any advice?
Was it soldered or pinned?
 

84ta406

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How hot did the torch get it, Propane or MAPP? Ironically the difference between the two when soldering pipes is huge so you never know. I have a Oxy-acetylene torch at work if you can't get it, worse case we can melt it off lol.
 

84ta406

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No clue if it gets hot enough for loctite but I know there's a huge difference between propane and MAPP when soldering copper pipes so maybe it's just not hot enough. Leaving it on longer doesn't change the heat applied temperature wise. 500* is 500* wether it's 10 mins or 20.

All my AR barrels have been RH thread
 
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I don't care if it is intact, I just don't want to mess the threads up.
Cutoff disc and a dremel. Or a cutoff disc and an angle grinder (if you do it cautiously).

Split it length wise on either side - from barrel to muzzle. Make light cuts until you see the threads (will look like black dots all in a row). The female threads are deeper than the male ones; you won't damage the male threads on the barrel. When it's split on both sides, you can use a flatbar to pry/split the device, leaving the barrel intact. If it's pinned, this will typically allow you to easily remove the side with the pin - it might take a few taps with a hammer.
 

sschevy

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Two things

if you can pull the fixture out of your vise , you need a better vise

trying to remove a stubborn muzzle devise with a upper vise block is inviting disaster , the correct fixture can make all the difference and possibly keep you from destroying your upper
 

chindogg

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Two things

if you can pull the fixture out of your vise , you need a better vise

trying to remove a stubborn muzzle devise with a upper bench block is inviting disaster , the correct fixture can make all the difference and possibly keep you from destroying your upper
I think I should just bring it to a gunsmith and pay a few bucks to have it done.
 

dlarge

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My vise setup sucks. The workbench is cheap and not secured to the floor.

I've removed a flash hider by hitting the wrench with a hammer. That bit of quick shock has worked for me. YMMV.

ETA: I use a Reaction Rod, not an upper block.
 
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sschevy

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If he’s using a upper vise block he’s transferring all his torque through the length of the barrel and on to the receiver , the same theory as torque limiting extensions

if it was pinned you’d be able to see it

depending on the brand of upper it could have rockset on it
 
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