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Old December 9, 2012, 01:00 PM   #56
Senior Member
Join Date: March 31, 2010
Location: Communist State of IL.
Posts: 1,479
I mounted my Magpul MBUS directly to my railed gas block. This is a big NO NO .
It depends on what Gen Magpul front sight you have. The Gen 2 is safe for gas block mounting according to Magpul. While the Gen 1 may melt if your firing at a fast enough rate.
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