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BUIS question

Discussion in 'GATE AR-15 Forum' started by engineer151515, Jul 26, 2010.

  1. engineer151515

    engineer151515

    14,165
    240
    Nov 3, 2003
    I'm looking at a Midwest Industries (MI) BUIS for an M4A3 Bushmaster with the stock fixed front sight.

    Would a SPLP (same plane low profile) BUIS work correctly or is their ERS (emergency rear sight) the correct choice? Other than one being a "low profile design", I'm not sure if there is a difference where one sight is used only with gas block front folding sights or whatnot.

    Thanks
     
  2. Constructor

    Constructor Moderator

    552
    5
    Dec 10, 2009
    Roaming
    The same plane sights are made to mount on a rail or gas block the same height as the receiver, all rear sights should be the same height.
    If you plan to mount a front sight on a lower gas block then you need to buy the taller front sight.
     

    Last edited: Jul 26, 2010