I'm the buddy. Can confirm. I left a jetboil stove under the gasblock til that dude was stupid hot and after breaking a couple nice allen wrenches I was able to get one out. Gave up on the last one. Took it to a smith and he was able to drill out the screw and save the gas block. After that experience if I ever want to make changes to my uppers that require gas block removal, I might use it as an excuse to buy a new upper. Good luck.
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