The Magpul Back-Up Sight is a low-cost, color injection molded, folding back-up sight. Specifically tailored to the AR-15/M16 platform, the MBUS Front Sight is adjustable for elevation and fits most 1913 Picatinny-railed handguards.
- ~1.6 MOA (1.886″/100m) per click with a 14.5″ sight radius
- ~1.2 MOA (1.367″/100m) per click with a 20″ sight radius
- Impact resistant polymer construction
- Spring-loaded flip up sight
- Detent and spring pressure keeps sight deployed
- Compatible with most Picatinny railed handguards
- Provides the same height-over-bore as standard A2 irons
- Protective wings shield the spring-locking A2 front sight post
- Elevation adjustment tool included
- Height – Stowed: ~0.51”
- Length – Stowed: 2.6”
- Length – Deployed: 1.5”
- Weight: 1.2 oz
NOTE: Cannot be mounted to a railed gas blocks due to excess heat issues. Front MBUS must be mounted to a railed handguard on the same plane as the receiver rail.