The MBUS Pro (Magpul® Back-Up Sight) is a corrosion resistant all-steel back-up sighting solution that delivers maximum functionality and strength with minimum bulk at a price that's even smaller than its size. The dual aperture windage adjustable Rear and no-tool elevation adjustable Front excel in all 1913 Picatinny rail mounting applications including rail-height gas blocks. Positive detents keep the MBUS PRO Front and Rear at standard AR sight height when deployed and so low when they are stowed that you'll never notice them until they're needed. Narrow width Front is compatible with most IR aiming laser and light installations for the professional user. Made in U.S.A. Features:
All steel construction
Case hardened and finished with Melonite QPQ&trade for extreme resistance to wear and corrosion
Mounts on any MIL-STD-1913 Picatinny/STANAG 4694 rail
Windage adjustable with low-profile knob - no tools required
Positive detents in both the up and down positions
I researched numerous flip up iron sights and am glad I went with the MBUS Pro. I like that they are steel and not aluminum like many others. They hold zero well and are extremely low profile both engaged and flat on your rail. Some do not like that they don’t lock in the “up” position, however that is a benefit. They are rock solid when raised but also allow for them to lay down without breaking in case they are dropped or bumped on something. If you want ones that are rock solid but don’t fold down then go for the Daniel Defense iron sights, which are great and I also ordered from Scheels. You will pay significantly more for the Mbus Pro sights than the polymer Magpuls, which I have as well and are great in their own right, but you will appreciate the quality you get for the price increase. I love these and would recommend to anyone.