Magpul MBUS Flip-Up Backup Sights - MPIMAG247OD

The Magpul MBUS Flip-Up Backup Sights (MPIMAG247OD) are spring-loaded auxiliary aiming systems designed for AR-15 and M16 platform rifles equipped with Picatinny rail handguards. These backup sights serve as a proven secondary sighting option when primary optics are compromised or unavailable—a critical consideration for both professional operators and trained shooters who depend on fast, reliable target acquisition.

Constructed from color-injected polymer, the MBUS delivers minimal weight penalty while maintaining functional durability in field conditions. The front sight features elevation adjustment capability to zero at distance, with protective wings that shield the spring-locking A2 front sight post during deployment and storage. The flip-up design activates from either side of the sight or via top-face pressure, allowing rapid presentation without requiring the shooter to remove their grip from the weapon or interrupt their shooting position. At 0.13 pounds, the sight adds negligible load to the platform while occupying just 4.25 inches of rail real estate when folded.

This sight configuration is purpose-built for operators running modern optic setups—red dots, LPVOs, or magnified scopes—who need a mechanically-indexed backup solution that requires zero batteries and zero electronics. Common deployment scenarios include duty rifles, patrol carbines, competition platforms, and training systems where backup iron sights remain mission-critical. The flip-up design keeps the sights out of the optical path when folded, preserving sight picture clarity with primary optics while remaining instantly available if the primary system fails or is obscured.

Magpul backup iron sights have become a market standard in tactical rifle setups due to their combination of low cost, reliable mechanical function, and compatibility with the dominant Picatinny rail ecosystem. The MBUS front sight pairs with Magpul's rear sight options to establish a complete auxiliary sight picture.