MBUS 3 Front Sight — Product Details

The next evolution in the Magpul Back‑Up Sight (MBUS) family, the MBUS 3 Front Sight combines the best features of the original MBUS and MBUS Pro into a compact, durable, and feature‑packed flip‑up front sight.

Overview

• Low profile & lightweight: folds to 0.47" high, 1.38" wide at its widest point, and weighs ~25 g (with hardware).

• Durable polymer construction: impact‑resistant polymer provides excellent durability while keeping weight to a minimum.

• Spring‑loaded deployment: fast, reliable deployment via an ambidextrous push‑button.

• Standard AR height when deployed: co‑witnesses with common optics setups.

• Made in the USA.

Key Features

• Full‑featured, spring‑loaded flip‑up design — quick deployment and secure lockup.

• Tool‑less elevation adjustment — easy on‑the‑fly zeroing without tools.

• Dual‑width enhanced front sight post — similar to the MBUS Pro for improved sighting options.

• Compact footprint — only 0.47" folded height and 1.38" maximum width for minimal installed height.

• Clamps to most MIL‑STD‑1913 (Picatinny) rails.

Benefits

• Minimal snag profile and low installed height when stowed.

• Rugged enough for operational use yet light enough to preserve weapon balance.

• Rapid, dependable front sight solution for backup or co‑witnessing optics.

Available Colors

• Black

• Flat Dark Earth (FDE)

• OD Green

Physical & Mounting Specs

• Folded height: 0.47"

• Maximum width: 1.38"

• Weight: ~25 g (with hardware)

• Deployed height: Standard AR‑height

• Mount: Clamps to most MIL‑STD‑1913 (Picatinny) rails

Front and side views show the deployed MBUS 3 Front Sight on a railed forend (with M‑LOK covers) highlighting compact dimensions and the easy‑to‑use release button; stowed views illustrate the low installed height and minimal profile.