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Posted: 4/28/2010 5:22:44 PM EDT
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picked up 4 Anvil Arms flat top uppers. installed an UPK onto it and the brownells EPC doesnt want to stay put. looks like the chamfer where the detent sits for the EPC has a pretty large landing on it. instead of the two chamfers coming together to a fine point, they have close to an 1/8" landing between the two compared to my SW MP15 its significant whats the best course of action? round file and close the tolerance of the landing just to where the detent will seat on the inboard side? |
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