The Magpul MBUS (Magpul Back-Up Sight) Front Flip-Up Sight (brand part number MAG247-GRY) is a Stealth Gray, color-injection-molded polymer back-up front sight tailored specifically to the AR-15 and M16 platform. It’s adjustable for elevation and fits most 1913 Picatinny-railed hand guards, with a spring-loaded design that flips up easily from either side or by pressing the top release. Protective wings shield the spring-locking A2-style front sight post, and the sight provides the same height over bore as standard A2 sights, giving shooters a proven, low-cost backup when a primary optic goes down. The Stealth Gray finish gives builds a distinct look beyond standard black.

Key Specifications

• Molded from low-cost, color-injection-molded polymer in a Stealth Gray finish.
• Built specifically for the AR-15/M16 platform.
• Adjustable for elevation and fits most 1913 Picatinny-railed hand guards.
• Deploys via a spring-loaded flip-up design, activated from either side or the top release.
• Protected by wings that shield the spring-locking A2-style front sight post.
• Provides the same height over bore as a standard A2 front sight.
• Adjusts at 1.6 MOA per click with a 14.5 inch sight radius, or 1.2 MOA per click at 20 inches.
• Weighs approximately 0.12 lb, adding minimal weight up front.
• Must mount to a railed fore end on the receiver’s plane; not compatible with railed gas blocks or MOE hand guards.
• Made in the USA by Magpul.

Frequently Asked Questions

How is the sight activated? It’s spring-loaded and flips up when pressed from either side or via the top release.

Can this mount to a railed gas block? No, it cannot be mounted to a railed gas block due to excess heat, and it also isn’t compatible with MOE hand guards.

Is this sight adjustable? Yes, it’s adjustable for elevation, with click values that change based on sight radius.

Buy the Magpul MBUS Front Flip-Up Sight – Stealth Gray

Add a proven, low-cost back-up sight in a finish that stands apart from plain black. Order it from our Magpul Industries lineup, part of our gun sights selection, at our Lubbock, Texas gun shop for fast, direct shipping.