The version used by the Cylons is wielded by Centurions and is capable of operating in all types of conditions, including cold (TOS: "The Gun on Ice Planet Zero, Part I") and damp (TOS: "The Young Lords") conditions.
The notable differences between this and the Colonial version is the circular muzzle, in addition to a small, jagged bayonet made from a clear material.
In the separate continuity
In close-quarters combat, Cylons will use rifle bayonets against their targets, even if it would be easier to kill them by simply firing at point-blank range to already prone targets (Classic Battlestar Galactica Vol. 1 #1, #4). This may suggest tactics that hew more towards personal predilictions than tactical expediency.