A scaled up version, this gun is in standard issue for most federation soldiers. lightweight and fast firing, just like a sub machine gun. but this gun does not use gunpowder, or gas. its ammo looks is no different from modern today. but the bullets are one big block. stored in cartridge, ready to load in the gun. once locked and loaded it slices of thin slices of the ammo block and accelerate it down the barrel using railgun technology. most soldiers are issued these around 4-3, so ammo isn't a worry. the yellow part of the cartridge is a holographic reading of the amount of shots left, most cartridges contain ammo blocks with 1000 shots each.
the laser sight works how it does today, so no explaining needed. the scope is standard issue but few soldiers dont use it unless the enemy is far away enough. the scopes are the same, so no explaining for you!