Loading... Please wait...The Ontario USMC Bayonet knife is used and issued by the United States Marine Corps. The Marine Bayonet has an 8" carbon steel blade that is .200" thick with a Rockwell Hardness rating of RC 53-58. The Marine Bayonet knife blade features a 1 3/4 " mission serration and a zinc phosphate non-reflective finish. The Dynaflex handle on the Marine Bayonet is truly practical with its ergonomic design and is made with a low noise signature polyester elastomer.