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how do i "Square" an upper?

Discussion in 'GATE AR-15 Forum' started by IQof1, Sep 2, 2010.

  1. IQof1

    IQof1

    545
    0
    Sep 4, 2009
    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