Quote:
Originally Posted by Edknn123
I had a gun company rep say poly sites were fine, just don't shoot rapid fire. He suggested MFT sites that look like cheap garbage to me. I call MFT for fun and they agreed they were ok unless rapid fired. I bought some metal sites to be replaced by Magpul Pro's eventually. Until then, the ones I have will back up my Sparc AR red dots.
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So, he told you that they work fine, until they don't...
Magpul states to not use them on the gas block. Melting is not actually the concern... they will become brittle. I typically will go with the word of the manufacturer when they tell you that their product is not suited for a particular use.