The MBUS (Magpul® Back-Up Sight) is an inexpensive, color-painted, foldable spare sight. The MBUS double-opening rear sight is adjustable for wind correction and fits most 1913 Picatinny rail equipped guns, but is specifically tuned for the AR15/M16 platform.
Made in the US.
FLIP-UP VISOR WITH SPRING
Spring-loaded flip-up visor, easy to activate from both sides or by pressing the top Protective wings protect the double, flat folding openings The visor can still be folded with the large or small aperture in position Fixed button for easy and positive adjustment of the wind correction
IMPACT-RESISTANT POLYMER CONSTRUCTION
Polymer construction provides light weight and resists operational abuse.
COMPRESSION SPRING KEEPS THE VISOR UPRIGHT
The pawl and spring pressure keep the visor upright but allow the visor to fold in unhindered in the event of a collision etc.
CLAMPS TO MOST MIL-STD-1913 PICATINNY RAILS
Clamps onto MIL-STD-1913 Picatinny/STANAG 4694 receiver rail and offers the same height-over-bore as standard A2 irons
