The Magpul MBUS 3 Front Sight is a spring-loaded, flip-up backup front sight for AR-15 rifles. It clamps to most MIL-STD-1913 Picatinny rails and sits at standard AR height when deployed, so it pairs with a standard-height rear backup sight.
The MBUS 3 combines features from Magpul's original MBUS and the MBUS Pro. It's much smaller than the original MBUS: 0.44" high when folded and 1.15" wide at its widest point, so it stays out of the way under an optic. It's made from impact-resistant polymer, which keeps weight down. An ambidextrous push-button releases the spring-loaded sight. Elevation adjusts without tools, and the dual-width enhanced front post is similar to the MBUS Pro's.
Features:
Mount the front sight on a rail at the same height as your rear sight, either a continuous top rail or a gas block with a matching rail height. Check that it locks up when deployed and folds flat under your optic. Zero it with your rear sight at the range.
