The Knights Armament flip-up M4 front sight is a low-profile backup iron sight built to mil-spec standards for AR platform rifles. Designed for shooters who want a dependable co-witness option alongside an optic, this steel-construction sight folds flat against your handguard rail when not in use—keeping your sight picture clean and your rifle's profile minimal. Originally developed for the US military's SOPMOD enhancement program, the KAC M4 front sight has earned trust across Army, Marine Corps, and law enforcement units because it maintains zero under hard use and handles the abuse that field conditions demand.
When folded, the sight base wraps around the leaf on both sides, shielding the sight post from impacts and snags that would throw a lesser backup sight out of spec. That protective design is typical of Knights Armament's attention to detail—every dimension and material choice serves function first. The low rail footprint means minimal interference with your optic's objective bell or side-mounted accessories, and the durable steel construction resists corrosion and wear better than polymer alternatives.
This is the front half of a proven backup sight system. Pair it with a rear flip-up sight for a complete iron setup, or run it solo as a fast-acquisition failsafe. Whether you're building a duty rifle, a 3-gun competition gun, or a hunting AR, a quality front sight from KAC gives you options without compromise.
Yes. The Knights Armament M4 front sight attaches to any rifle handguard equipped with a standard Picatinny rail, which covers the vast majority of modern AR-platform rifles.
The sight is designed as a backup iron sight for co-witness use alongside optics. Exact co-witness height depends on your rifle's rail geometry; verify compatibility with your specific optic and setup.
You can use this front sight as a standalone backup option, though a matched rear sight completes a functional two-aperture system. Many shooters pair it with a KAC rear flip-up sight for a complete iron backup setup.
The package contains the flip-up front sight itself. Standard mounting hardware and installation instructions are included, but verify your handguard's rail setup before purchase.
KNIGHTS MFG COMPANY
Griffin Armament
