The Magpul MBUS 3 Front Sight is a folding backup sight constructed from impact-resistant polymer. It mounts to a Picatinny rail and uses spring-loaded deployment with an ambidextrous push-button. The sight provides tool-less elevation adjustment and is designed for standard AR-height configurations when deployed.

Key Specifications

• The sight is a front folding backup sight for compatible long-gun configurations.
• The construction uses polymer for a lightweight design.
• The finish and sight color are black.
• The base configuration is a Picatinny rail mount.
• The listed fit includes AR-10, AR-15, M-4, M16, M110, and SR-25 platforms.
• The sight uses spring-loaded deployment with an ambidextrous push-button.
• Elevation adjustment is tool-less and uses a dual-width enhanced front post.
• The listed adjustment rate is 1 MOA or 0.7 MOA per click, depending on sight radius.
• The sight is designed for standard AR-height when deployed.
• The product is made in the USA.

The MBUS 3 Front Sight offers a practical, low-profile sighting option for compatible AR-platform setups. Its folding format, accessible elevation adjustment, and polymer construction support streamlined rifle configurations where a front backup sight is required. It must be mounted to a railed fore-end on the same plane as the receiver rail and is not intended for installation on a railed gas block or MOE hand guard.

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