Multiple Aperture Device -MAD- Back Up Iron Sight With Ranging A
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Low profile, solid 4140 steel and 6061-T6 aluminum construction, solid locking detent with button release and mil-spec finish. It is also a ranging sight. Unique rotating multiple aperture disc has 5 apertures preset to specified distances. In particular, 0=25 and 200yds 3=300yds 4=400yds 5=500yds 6=600yds. A small window facing the shooter provides a numerical cue as to the range. All apertures are the same diameter--.070 inch diameter. Apertures have been preset using the ballistic calculations for 55 grain through 62 grain ammunition used in the AR15/M16 16 inch carbine length weapon.