- come with adjustment key for front sight pole (Limited)
- A Sight Designed As A Low-Cost. Folding Back-Up Sight
- Spring Loaded Flip-Up system, release lever can be reached on left, right & top position
- Solid click sound when sights are locked into position
- No need to release lock to fold
- Standard Adjustable M16 Style Sight Post
- Rear sight comes with Dual Apertures and Adjustable Windage
- The MBUS Fits All 20mm Rail Equipped Weapons
- Constructed of same DuPont Polyer material as the Famous PMAG
- Magpul Authorized Products