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Nope.
Any kind that will fit. Typically, under the gas block is .750" Remove the mini-y (it may already be loose) and slip on a FSB or block. Or, buy the YHM block with folding flip up sight, www.yankeehillmachine.com/store/sights.html and just bolt this one right on without messing with the mini-y. However, since the miniY is such a loud brake, why not take this chance to ditch it and thread on a flash hider? |
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Well we took of f the break on my other barrel but it was a P.I.A. Since I live in NY the comp has to permenantly attached. It took a great deal of grinding to get it off and replace it with a mock supressor. I was trying to save myself the trouble of going through that again. |
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