Troy type folding Tactical rear sight.
Suitable for all M4/M16 & AR-Series with standard 20mm Gun rail.
Install on the 20mm rail with a large thumb screw.
Windage adjustment by thumb dial.
Large and small holes flip selection for 300 & 600 meters aiming.
Spring Loaded Flip-Up system.
When you install a scope on your rifle ,you won't block your sight by Rear Sight.
No need to release lock to fold.
Constructed of alloy metal, extra strong shock absorption ability.

Specifications :
Color -Matte Black
Weight - 70g
Material - Alloy metal