The AR-15 Flip-Up MBUS Gen 2 Front Sight by Magpul is a low-profile, polymer backup sight that mounts on a flattop and deploys instantly with a finger touch.
It is designed for streamlined use with no snagging on gear, ambidextrous deployment, and occupies less than 1" of Picatinny rail space.
The front sight aligns with standard A2 iron sight height over bore and must be mounted on the same plane as the receiver rail for accurate use.