Magpul MBUS 3 Front Sight
The Magpul MBUS 3 Front Sight is constructed of impact-resistant polymer for a lightweight but durable build, and features a spring-loaded, ambidextrous push-button deployment for quick activation. When folded, it sits just ~0.47 in (≈ 12 mm) above the rail, minimizing snagging risk; when deployed it rises to standard AR-height for consistent alignment with rear sights. The sight includes a dual-width enhanced front post and allows tool-less elevation adjustment for quick zeroing. It clamps to most MIL-STD-1913 rails and is compatible with common AR platforms such as AR-10, AR-15, M4, M16, M110, SR-25, among others. Weighing about 25 g (with hardware), the MBUS 3 balances low weight and tactical robustness for field or sport use.
Key Features
Impact-Resistant Polymer Construction: Durable yet lightweight
Spring-Loaded Flip-Up Design: Quick deployment via ambidextrous push-button
Low Profile When Folded (~0.47 in / ≈ 12 mm): Reduces snagging when not in use
Standard AR-Height When Deployed: Ensures compatibility with standard rear sights
Dual-Width Enhanced Front Post: Improved front sight visibility and reliability
Tool-less Elevation Adjustment: Easy zeroing without special tools
Picatinny Rail Compatibility: Fits most MIL-STD-1913 rails
Lightweight (~25 g): Minimal added weight to the rifle
All Technical Data
Brand: Magpul
Material: Impact-resistant polymer
Mounting Interface: MIL-STD-1913 (Picatinny) rail
Position: Front sight
Folded Height Above Rail: ~0.47 in (≈ 12 mm)
Compatibility: Rifles AR-10, AR-15, M4, M16, M110, SR-25 (and similar platforms)
Weight (with hardware): ~25 g
Elevation Adjustment: ~1 MOA (≈ 1.13″/100 m) per click with short sight radius (14.5″); ~0.7 MOA (≈ 0.82″/100 m) per click with long sight radius (20″)
Deployment Mechanism: Spring-loaded flip-up via ambidextrous push-button
Post: Dual-width enhanced front sight post, tool-less adjustment
Why Choose This Product?
The Magpul MBUS 3 Front Sight delivers a reliable, low-profile backup or primary aiming solution combining lightweight durability and functional versatility. Its impact-resistant polymer construction and spring-loaded flip-up system make it robust yet easy to deploy when needed. Because it folds low and deploys to standard sight height, it’s well-suited for modular rifle platforms using Picatinny rails. Its ease of installation and tool-less adjustments add convenience for field use, maintenance, or switching configurations.
English 
Service très rapide merci (Translated by Google) Very fast service, thank you.