Stuck gas block

[zzero000]

Any suggestions on removing the stuck gas block?
I have tried to hammer it down after using a heat gun and propane torch.
It barely moves.

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[hisokas]

If you think Rocksett was used, soak it in water for 20 minutes, a couple of hours or overnight.

 

[Caveman Jim]

Penetrating oil?

 

[Czechsix]

whole barrel in the freezer for a few hours, then hit the gas block with a mapp or propane torch. Heat it fast enough and it'll slide off.

 

[Hooyah DeepSea]

Did you originally install it? if not, and it's a factory install, check for secondary set screws in the bottom of the pocket. I've seen set screws on top of set screws used as locknuts. Check it out.

 

[Member 34319]

Soak in CLR it will eat up all the crud.

 

[msgriff]

Most likely it's just the carbon seal from use. I would be very cautious with CLR, it's an acid that can cause issues and will void most warranties. Best bet is repeated application of firearm specific carbon remover. You can clamp the barrel with vise blocks and rotate the gas block, but that can score the journal and/or block, especially if the set screws raised a burr. If you're willing to sacrifice the gas block, carefully cut it off without damaging the barrel.
One or two manufacturers us a sealant, like 620. Some LMT barrels are press fit gas blocks. Those both have specific removal procedures.

 

[zzero000]

Did you originally install it? if not, and it's a factory install, check for secondary set screws in the bottom of the pocket. I've seen set screws on top of set screws used as locknuts. Check it out.

Yes, I installed it myself. I kind forgot if there were secondary screws, but I don't think it has them.
Here is the link to the product.

CMC Triggers Gas Block Low Profile AR-15 LR-308 0.750 Inside Diameter

Low Profile version is a low and narrow, one-piece block designed to fit inside most free-float hand guards; allows use of rifle length forearms on...

www.midwayusa.com

 

[zzero000]

So far used half a bottle of 3in1 to soak it a night

3-IN-ONE 4 oz. Fast-Acting Penetrant Drip Oil 120015 - The Home Depot

3-IN-ONE Fast-Acting Penetrant quickly loosens stuck parts and prevents rust. Penetrates up to 3 times faster than the leading competitors* Prevents rust better than the leading competitors** Marksman

www.homedepot.com

Tried to remove it with and without the propane torch, still barely moved.
Going to try for another night.

 

[Certaindeaf]

As with any frankenrifle, finding the neck bolts can be a difficult task.
Good luck!

 

[TTSX]

It's $36, how badly do you need it off? If you're going through many products and several hours of frustration, it might just be worth it to cut the thing off and install a brand new one. If you try too hard, you might even damage a $100+ barrel or buy more than $36 of tooling.

 

[DLS]

KROIL is the best penatrating oil out there. Once you start using it you will wonder how you got by without it.

That and the freezer / heat method mentioned works well.

If that doesn't work then I'm in the cut it off group.

 

[Czechsix]

So far used half a bottle of 3in1 to soak it a night

3-IN-ONE 4 oz. Fast-Acting Penetrant Drip Oil 120015 - The Home Depot

3-IN-ONE Fast-Acting Penetrant quickly loosens stuck parts and prevents rust. Penetrates up to 3 times faster than the leading competitors* Prevents rust better than the leading competitors** Marksman

www.homedepot.com

Tried to remove it with and without the propane torch, still barely moved.
Going to try for another night.

How much are you heating it? Don't be afraid to get that sucker hot - as in glowing. It'll come off. That's why I mentioned mapp gas, gets stuff hotter faster. Unless you have oxy/acet, that'll work even faster.

Kroil is a good call too, or mouse milk. Could also just use Ed's Red, that'll work well also.