These Are New In The Package. Sealed .
MATECH Mil-Spec BUIS – Back Up Iron Sight – With Ranging
Rigorous testing at Fort Benning & Aberdeen proving grounds has led this sight to be adopted by the US Army. This tactical Backup Iron Sight is the standard issue iron sight for all new and fielded US Military M4 carbines & M16 flat-top rifles.
- Compatible with any Picatinny style rail system
- Designed by Picatinny/MaTech engineers
- One-touch flip up aperture for instant utilization
- Extremely low reflective signature
- Precise range & windage adjustments up to 600 Meters
- Tested to retain zero under extensive firing conditions
- Can be used in conjunction with any standard optic