Magpul MBUS Front Sight - Olive Drab Green
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.
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.
- ~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
Ratings & Reviews
by C S
This sight is light, simple to deploy and adjust. Mine is rail mounted with a 1/3 cowhitness micro dot and the color matches my stock and grip. It's polymer so don't put it on anything that gets hot. To me the weight and compact style are the major advantages.
by BENNIE WILLIAMS
I have installed at least 20 MBUS SETS. No complaints at all
Magpul Backup Sights
Happy with the sights. The rear sight folds under my Primary Arms 3X Magnifier which is behind a EOTech 512. The front sight is on the front of a rail handguard. the front sight folds down below the EOTech. When both sights are up I have a target rear and front through both optics. Primary Arms is the best.
I was dead set on getting troy flip battle sights, but couldn't pull the trigger on price. I have a black rifle with od green accents, so i liked that these gave me a different color option, lighter, rave reviews, etc. I watched a few video reviews and read articles comparing the mbus to troy and diamondhead and was amazed when watching the drop test. I do not think these are the quality of the others but couldn't believe these things out lasted the others in harsh conditions. They broke but we're still usable and held zero where the metal options were bent and no longer serviceable. That was my selling point. Cheaper, lighter, and durable. Love it.
Does the job.
Just as the title says, these sights do the job just fine. If all you shoot with are irons, maybe you want to go with the more expensive all-metal sights, but for B(ack)U(p)IS, these are great.
by Luis Garza
Great look, very smooth, good quality, its MagPul the best.
Magpul flip up front sight
Looks and works great. Mounts solid to the yhm diamond series rail. Very happy with the product and service.
Awesome product and fast shipping
It's magpul partnered with primary arms shipping, need I say more?
by Richard Przybylski
Item arrived as promised with quick turn around on the shipping. Will do business with again.
by John Keoasa
Shipping was real quick. Got it in two days. Great package and product. Will order some more stuff from here.
MBUS flip up front sight
by Kim Foster
Arrived quickly. Fits properly. Works as expected. MBUS are good quality and rugged. An excellent choice for back up sights.
Great product! Solid design & perfect fit.
Magpul sites for the win!
by Ruben M.
Item just as ordered and very fast shipping. Thank you Primary Arms.