M6 series

"The M6 has been in service for about a hundred and forty years… it’s amazing to think how little it has changed in all that time."

- Anonymous E2-BAG/1/7 serviceman

M6 is a series of short-barreled weapons produced by Misriah Armory.

Introduction
They have seen widespread distribution through the United Nations Space Command Defense Force as lighter firearms, although they are not seen as primary weapons because of their lighter penetrating power compared to larger weapons and smaller magazine capacity, and are mostly issued to officer and vehicle crews.

They have seen usage in the UNSC for almost 140 years, and have been used in almost every conflict since then.

Characteristics
The M6 series weapons are recoil-operated and magazine-fed, and typically fire 12.7mm x 30 ammunition, and despite the large caliber, oftentimes "exotic" ammunition is not utilized. They are also remarkably large and overpowered to an extent, appearing to be rendolent of a cross between a pistol or a rifle in size. Despite being powerful, the M6 line of weaponry is durable, able to remain operational after Slipspace transitions and high-g aerial manuevers. However, its heavy weight limits its distribution amongst personnel.

They have remained remarkably unchanged during its decades of service, although there are a large number of variants, such as the B, C, D, G, and J variants.

Series

 * M6A Magnum Sidearm - Used mostly by civilian security forces, more comfortable to shoot.
 * M6B Magnum Sidearm - Used mostly by civilian security forces, KFA-2 x2 scope, more comfortable to shoot.
 * M6C Magnum Sidearm - Halo: Combat Evolved-era UNSC sidearm, armed with high explosive ammunition and featuring KFA-2 x2 scope.
 * M6D Magnum Sidearm - Halo 2-era UNSC sidearm, armed with semi-armor piercing ammunition.
 * M6G Personal Defense Weapon System - Halo 3-era UNSC sidearm, armed with high explosive ammunition.
 * M6J Carbine - UNSC Army carbine variant of the M6 series.