C-14 Custom is a custom version of C-14 Impaler made for 9th cycle of 1st Perpetual Competition of the PMG Wiki.
Many moving parts of the gun wave been modified to be operated by electric motors, allowing for faster movement of the pieces. The loading and firing is done electrically, meaning the bolt will not move, allowing for higher velocity on the bullet while increasing recoil.
It has a mag-fed bullpup semi-auto underbarrel grenade launcher rather than the bayonet. The GL only accepts caseless ammunition and the opening is used to cool it off to avoid overheating the gun.