Magpul MBUS 3 Sight - Front - MAG1166

The third generation of the world's most popular backup sight — stronger, slimmer and smoother than ever.

The Magpul MBUS 3 Front Sight (MAG1166) refines the polymer backup sight that armed a generation of rifles. The housing is strengthened against crush and impact, the profile is slimmed to reduce snags, and the spring-loaded deployment now runs on crisp constant tension — press the release and the sight snaps up positively, from either side, every time.

The detail shooters notice most: the MBUS 3's tool-less front post adjustment, which makes zeroing dramatically quicker than wrestling with a legacy A2-style post tool. Impact-resistant polymer keeps weight and cost down while shrugging off the daily knocks of training — the pragmatic backup for optics-first builds.

Why shooters choose the MBUS 3 Front

• Strengthened GEN3 housing — tougher where MBUS sights get hit
• Constant-tension deployment — crisp, positive, ambidextrous
• Tool-less elevation adjustment — the fastest-zeroing MBUS yet
• Slim, snag-resistant profile — folds low and clean
• Three finishes — Black, Flat Dark Earth, Olive Drab Green

Fit & installation

Clamps to any 1913 Picatinny top rail at the forward position. Pair with the MBUS 3 Rear (MAG1167) for a matched, ambidextrous backup system.

Specifications

• Model: MAG1166
• Mount: 1913 Picatinny top rail
• Type: Flip-up front backup sight
• Material: Reinforced polymer
• Finishes: Black, Flat Dark Earth, Olive Drab Green

The proven backup, perfected. Order the MBUS 3 Front today — in stock at Xtreme Tactical Gun Parts with free UK delivery.

Explore more: Iron Sights & Backup Sights, AR-15 Parts or browse all Magpul.