Magpul MBUS Rear Sight MAG248 Black Folding Backup Iron Sight

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Description

The Magpul MBUS Rear Sight MAG248 delivers reliable backup sighting capability when primary optics fail. This spring-loaded folding sight automatically deploys under pressure and locks securely in position for immediate target acquisition on AR-15 and M16 platforms.

What Makes This Different

Unlike fixed iron sights that obstruct optic sight pictures, the MBUS rear sight folds completely flat when not needed. The sight features dual apertures - a large 0.070" peep for close quarters and a precision 0.040" aperture for distance shooting. Spring-loaded deployment means the sight pops up instantly when pressed, eliminating fumbling during critical moments.

Key Features

Spring-loaded folding mechanism deploys instantly under thumb pressure
Dual aperture design: 0.070" CQB aperture and 0.040" precision aperture
Fits all MIL-STD-1913 Picatinny rail systems without modification
Impact-resistant polymer construction withstands repeated use
Tool-free windage adjustment with positive click detents
Same-plane height as standard A2 front sight post
Ambidextrous design accommodates left and right-handed shooters

Field testing demonstrates consistent zero retention through thousands of deployment cycles. The sight maintains accuracy across temperature extremes from -40°F to 140°F, making it suitable for duty use, competition shooting, and hunting applications. Corrosion-resistant hardware ensures reliable function in humid coastal environments and desert conditions.

Technical Specs

Weight: 1.2 ounces
Length: 1.15 inches
Width: 1.25 inches
Height (deployed): 1.17 inches
Height (folded): 0.44 inches
Material: Reinforced polymer construction
Mounting: MIL-STD-1913 Picatinny rail compatible
Adjustment: Windage adjustable
Country of Origin: Made in USA

Professional armorers and competitive shooters choose MBUS sights for their proven track record in demanding environments. The MAG248 rear sight pairs perfectly with Magpul front sights to create a complete backup iron sight system that won't interfere with optics or accessories.