Got a Real-World Weapon, Armor or Tactics Question? Mk. XXVII

[The Jack]

Plus all the other little things like:
Small things are easier to carry. Theyre also cheaper to make and maintain, and are less likely to break.
Short blades are less likely to cause accidents in a formation. They are likely easier to take off and on and to stow.
maybe a little more modern but i'd imagine a bayonet would make the gun less ergonomical in tight spaces and if you were hiding for any reason the longer bayonete could be a bit of a problem.