This is a Midwest Industries Sight known as the Combat Rifle Sight, model MI-CRS-F.
The Midwest Industries Combat Rifle is a low profile" compact mil spec height folding front rifle sight. Weighing in at only 1.4 oz." this 6061 aluminum sight uses a standard A2 front sight post" and each click adjusts the sight by 1.5 MOA.
Features:
For AR15/M4/M16 Rifles and other platforms
Low Profile .437 when folded down flips up to Mil-Spec sight height
Uses standard A2 front sight post
Dual locking detent springs
1.5 MOA per click adjustments
