This is a Midwest Industries Sight known as the Combat Rifle Sight, model MI-CBUIS.
The Midwest Industries combat rear iron sight uses a standard A2 rear sight aperture which is protected by billet machined T6 6061 aluminum. 100% US made.
Features:
For AR15/M4/M16 Rifles and other platforms
Mil-Spec height
Standard A2 rear sight aperture
Rifle .5 MOA / Carbine .65 MOA click adjustments
