The MSMC is a sub machine gun with some characteristics of an assault rifle. It is good at medium to long range compared with other sub machine guns, but only better at medium range than assault rifles. It sounds very satisfying though, unless you put a silencer on it. This guide explains how to use it well and what the best class setup is.
At the end of this guide is a YouTube video with a visual version of this guide.
The MCMS Sub Machine Gun in Call of Duty Black Ops 2 has a slow fire rate but high damage. It has reasonably strong recoil though which makes up for the high damage. As a result it is best used similar to an assault rifle. But it is still a sub machine gun so you don’t have to use cover as much since it is best if you strafe and aim rather than stand behind cover and aim. When you see an enemy start with hip fire and aim down the sights whilst you fire. At the same time as you start shooting start strafing to the left or right to cause the enemy to start missing you.
Hip fire shouldn’t be used exclusively unless you are very close to an enemy. Weapons with a slow fire rate usually don’t do well at hip fire since it is based on a chance to hit in a certain area and the less bullets the less likely you are to hit. So aim down the sights is almost always better than hip firing. If you are at long range it is better to evade the engagement and flank the enemy to force him into closer range combat.
The class setup I recommend is the following:
When you are strafing an enemy the faster you can move the better. Lightweight gives you a slight increase in movement speed. When you are aiming down your sights flinching due to enemies shooting you is one of the main reasons you miss. Toughness reduces the flinch from incoming fire. Tactical mask is a good perk as you are close to the main fight and tactical grenades are likely to be coming your way.
Semtex are better for this class as you are a bit more aggressive and normal Grenades take a bit longer to blow up. Concussion grenades can be substituted for any other tactical grenade depending on the game mode you are playing and your preferences. A secondary is good with the MSMC so you can switch to it when the MSMC runs dry in a gun fight.
The combination of bad iron sights and recoil make the MSMC difficult to aim with the iron sights at medium range. The Reflex Sight makes the view on the target a bit clearer so you can aim better. The Adjustable Stock increases your movement speed whilst you are aiming down the sights which is an extra benefit on top of Lightweight.