M6J/C carbine

The M6J Carbine is a United Nations Space Command ground firearm.

It is the carbine variant of the M6 Series of sidearms made by Misriah Armory, and is used by the UNSC Army.

Trivia
But it is weaker compared to the M6D
 * A carbine, in pistol terms, is a pistol with an attached stock. It is most likely that the M6J is similar to an M6D, with an added stock and barrel to increase its size to that of a carbine weapon and its dead mass (thus reducing recoil) and to allow more precise aiming.