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[ARCHIVED THREAD] - Evolution 7 EX install advice

Posted: 12/26/2013 2:15:02 PM EDT

I've installed the 7 EX but now having problems reinstalling my Yankee Hill YHM-9396 front sight tower/gas block. There is minimal room to tighten the 4 7/64" allen screws. Any advice? Thanks in advance!

[ARCHIVED THREAD] - Evolution 7 EX install advice