The MBUS (Magpul Back-Up Sight) is a low-cost, polymer, color-injected folding back-up sight. The MBUS Front Sight is adjustable for elevation and fits most 1913 Picatinny-railed hand guards, but is specifically tailored to the AR15/M16 platform. Made in the USA.

• Impact-resistant polymer construction provides light weight and resists operational abuse.
• Spring-loaded flip-up sight is easily activated from either side or by pressing the top.
• Detent and spring pressure keep sight erect but allow unobstructed folding under impact, etc.
• Clamps to most any MIL-STD-1913 Picatinny/STANAG 4694 railed hand guard and provides the same height-over-bore as standard A2 irons.
• Protective wings shield the spring-locking A2 front sight post
• Elevation adjustment tool included, but most aftermarket A2 front sight adjustment tools may be used as well
• MBUS – Front Gen 2
• Weight, w/ hardware: 1.2 oz.
• Height above rail stowed: ~0.51 in.
• Length stowed: 2.6 in.
• Length deployed: 1.5 in.