Attaches directly to the flat top receiver; Raises line of sight 1/2"; Works with GG&G's MAD or A2 rear back up iron sight; Offers proper cheek weld height when used with red dot & conventional optics; Protects receiver's integral rails from wear and damage; Dovetail is manufactured to MIL-STD-1913; Full length sidebar provides positive and perfectly aligned lock up even on worn or out of spec receivers; Manufactured from rock solid billet 6061-T6 aluminum alloy; Type III hard coat anodized non-reflective Matte Black per Mil-Spec