The FBUS (FMA Back-Up Sight) is a colored, foldable backup sight set.

This versatile option features dual aperture and is adjustable for windage, suitable for most weapons equipped with a 1913 Picatinny rail, with special adaptation for the AR15 / M16 platform.

• Spring-loaded deployment: Easily activated from either side or by pressing the top.
• Protective wings: Cover the dual apertures at the same plane.
• Can be folded with either the large or small aperture in place.
• Windage adjustment: Easily and precisely adjustable by pressing the top of the retention button.
• The protective wings cover the front sight A2 spring.

Weight: 31g + 34g

Material: Plastic

Colors: BK, DE, FG, OD