how do i "Square" an upper? [Archive] - Glock Talk

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IQof1
09-02-2010, 15:49
i read in a previous post where a guy had a problem getting his iron sights to line up after replacing his upper with a flat top, in that post i saw a reference to squaring the upper.

i just bought a VLTOR MUR-1A and plan on putting a Daniel Defense 16" 1:7 barrel on it with a Troy MRF 14" free float rail system. i am hoping with everything i read about VLTOR's quality that the upper will be previously squared, if not, how do i go about makign it so?

thnx,

d

Constructor
09-02-2010, 20:46
This is the way most home builders do it.
http://www.brownells.com/.aspx/pid=20220/Product/AR_15_M16_UPPER_RECEIVER_LAPPING_TOOL