Gun Sizes WWII to today, or what you should have when fighting Cthulhu...or zombies
These are three of my guns.
Bushmaster AR15 Carbine. Same size as M4 Carbine Pretty Light to carry, Very maneuverable, Medium power round
Best uses good short, good medium range, Decent sniper
Firepower (Ammo capacity) Very Large 40-120rnds
M1 Garand (yes it has the grenade launcher attached)
Heavy to carry, Poor maneuverability, Heavy power round
Best uses, Good medium,Good long range, Excellent sniper
Firepower (Ammo capacity) Poor 8rnds
M1 carbine (paratrooper stock)
Very Light to Carry, maneuverable, Light power round
Best uses good short, Fair medium range, poor sniper
Firepower (Ammo capacity) Large 40rnds
All the above guns have bayonet lugs.