A Bayonet is a long Combat Knife or blade usually attached below the barrel of a ranged weapon to aid the user in close combat. The blade usually has one cutting edge and doubles as a combat knife when detached from the underslung attachement of the barrel. The Imperial Combat Bayonet is used exclusively by the Imperial Guard, although both the Space Marines and the Sisters of Battle have been known to make use of bayonets as well.
Orks have also been known to make use of bayonet-like attachements they call "Stabby Bitz", but they are less of a standardised tool and more of a personal modification to the individual's weapon. Necron Gauss Weapons also commonly mount large blades underneath their muzzles similar to the classical Bayonet.
- Warhammer 40,000: Wargear (2nd Edition)
- Warhammer 40,000: Wargear (4th Edition)