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 UNSC serviceman

The M6 Series is a series of short-barreled weapons produced by Misriah Armories.

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 40 projectile 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 redolent of a cross between a pistol or a rifle in size. In addition to power, the M6 line of weaponry is designed to be rugged and reliable, and the guns are able to remain operational after Slipspace transitions and high-g aerial maneuvers. However, the heavy weight limits its distribution amongst personnel, and the M6 weapons have a tendency to drop casings on the wielder's foot, leading some UNSC personnel to favor the M7/Caseless Submachine Gun which operates on a caseless system.

They have remained remarkably unchanged during its decades of service, although there are a large number of variants, such as the A, B, C, D, G, and J variants. The M6 series handguns are issued in three different finishes: hard chrome, black polymer, and electroless nickel.

Trivia

 * Despite constant comparison with the real world Desert Eagle pistol for their sharing of appearance, size, and ammunition calibers, the M6 remains drastically different for being recoil-operated instead of the desert eagle's unique gas operation.
 * The M6D is the only M6 with any kind of aim assisting device seen in game: the weapon's 2x magnification scope. The Halo 3 M6G has a laser sight, although it's never seen in game.
 * Despite using the same kind of ammo, all of the three M6 pistols encountered in the games do different damage. This is due to game balancing.

Series

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