NCStar AR-15 Flip-Up Front Sight — Low Gas Block

The NCStar AR-15 Flip-Up Front Sight is a compact backup iron sight intended for use on AR-15 gas blocks with Picatinny rails positioned below the receiver rail. The A2 front sight post is fully adjustable for elevation and folds down out of the optics sightline when not required. Constructed from aluminum and steel, the unit is built for routine field use while maintaining a low profile. Length measures 1.2 inches when extended and 2.1 inches when folded.

Key Specifications

• Mounting: designed to mount on top of gas blocks with Picatinny rails lower than the AR-15 receiver rail, providing a low gas block mounting option.
• Sight type: flip-up front sight (back-up iron sight).
• Front post: the A2 front sight post is fully adjustable for elevation.
• Foldability: the A2 front sight post folds down out of the view of optics when not in use, offering a fold-down profile.
• Construction: manufactured from aluminum and steel for balanced weight and durability.
• Color: finished in black.
• Length: measures 1.2 inches extended and 2.1 inches folded.
• Manufacturer: NCStar.

This flip-up front sight provides a straightforward, low-profile backup to optical setups on AR-15 platforms with low gas block Picatinny rails. Its fold-down A2 post and elevation adjustability make it practical for range use, training, and any application where retaining a reliable mechanical front sight is desired. The combination of lightweight materials and compact dimensions keeps the sight out of the way until needed while delivering consistent, repeatable adjustments when deployed.