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Old 10-08-2012, 09:06   #6
Senior Member
Join Date: Nov 2009
Location: Florence,KY
Posts: 123
There is a pin on the barrel that sets it square into the upper reciever. If you are talking about the front sight block, you will either just reset the front sight and set the pins back or if replacing with a clamp on style, yes, you will have to level it off.

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