The Ontario OKC3S Marine Bayonet is the bayonet currently issued to the United States Marine Corps. Ontario Knife Company has produced the OKC3S for the Marine Corps under military contract — the bayonet on this Amazon listing comes from the same Franklinville, New York forge that fills the contract, built to the same MILSPEC tolerances.
The bayonet attaches to the M16 family of rifles and M27 IAR via a standard bayonet lug, with a sturdy hard sheath for belt carry. The blade geometry is designed for both combat and field utility — the OKC3S replaced the previous M9 Bayonet for Marine Corps issue in 2003 and has been the active service bayonet since.
Ontario Knife Company has been forging knives in Franklinville, New York since 1889. Every blade is built in the same Western New York facility that supplies the U.S. military with the M9 Bayonet and ASEK survival knife — the same forge, the same heat treatment, the same finishing line.






