The MK 23 is a pistol featured in Sniper: Ghost Warrior.
The MK 23 is used as a sidearm throughout the campaign and is always suppressed, allowing for silent kills at close range. This pistol also has a 12 round magazine which can allow for a few silent kills before reloading. It is a fairly powerful weapon for a pistol and can mean the difference between life and death if fighting enemies in close quarters.
The MK 23 is one of only two pistols in multiplayer. It is used in almost every class.