Midwest Industries ERS (Emergency Rear Sight) Flip-Up Rear Sight. All of Midwest Industries products focus on providing top notch quality and reliability you expect from products made in the U.S.A. Backed by Midwest Industries Lifetime Warranty.

Features :

• A2 style dual aperture
• Thick rugged pivot ears
• ,Locking detent with double the locking surface, for maximum strength,
• Lock detent button with stepped down turns
• .65 MOA on M-4 type rifles / .49 MOA on A-4 type rifles