This is a Midwest Industries Sight known as the Combat Rifle Sight, model MI-CRS-SET.
Midwest Industries combat rifle sight set includes a MI combat rifle front sight" MI combat rifle rear sight" and a MI A2 front sight tool.
Features:
For AR15/M4/M16 Rifles and other platform
Front sight is low profile uses standard A2 front sight post has duel locking detent springs and 1.5 MOA per click adjustments
Rear sight is super low profile flips up to mil-spec height has duel locking detent springs and Rifle .5 MOA / Carbine .65 MOA click adjustments
