[Daffynition]

You tell me. USMC News

http://www.globalsecurity.org/military/library/news/2004/09/mil-040908-usmc02.htm

New multi-purpose knife replaces old bayonet

[BlessingsofLiberty]

Well, you are playing with semantics.

Check this out.

According to the official U.S. Marine Corps website, every Marine is STILL required to complete a bayonet training program ... because “the weapon becomes just as effective [as a rifle] in close combat situations.”

http://www.freerepublic.com/focus/f-chat/2949015/posts

[PJBankard]

You tell me. USMC News

http://www.globalsecurity.org/military/library/news/2004/09/mil-040908-usmc02.htm

New multi-purpose knife replaces old bayonet

You should have read the article you referenced. Second sentence:

..the Marine Corps has a new weapon replacing the Bayonet - the Multi-Purpose Bayonet model number OKC-3S from the Ontario Knife Company.

And again second paragraph, first sentence:

The Multi-Purpose Bayonet with scabbard will provide greater durability than the M-7 Bayonet with scabbard and shall function as a fighting knife as well as a bayonet

Per Merriam-Webster, a Bayonet is a steel blade attached at the muzzle end of a shoulder arm (as a rifle) and used in hand-to-hand combat.

Having used the Multi-purpose "knife' as you call it. I have attached it to my rifle during my time in the Marine Corps. It is a bayonet.