Category Pistol
Type Semi-Automatic Pistol
Marks 2
Cartridge 12
Magazine size 12
Tom Clancy's Splinter Cell series information
Appears in See Appearances
"Available by default, the silenced MK.23 pistol is averagely balanced, but still gets the job done."
― in-game description[src]
 The Heckler and Koch Mark 23 (shortened MK.23) is a semi-automatic handgun, chambered for the .45 ACP (Automatic Colt Pistol) cartridge.


A predecessor the the Heckler and Koch USP semi-automatic pistol, the MK.23 was designed by German weapons manufacturer Heckler and Koch. It's large size and weight was kept in mind during development, to help absorb recoil and retain accuracy. While it does have some positives, it's very same distinct design choices are the same criticisms towards it: it's weight and size make it ideal for offensive measures, but not as good for defensive use.

Gameplay Edit

In Tom Clancy's Splinter Cell: Conviction, the MK.23 is available for use by the player. It is the first pistol available to Sam at the beginning of the game. It holds 12 rounds by default, 18 after purchasing the Extended Mag upgrade. It is a powerful pistol; after the upgrade, damage per shot is second only to the Desert Eagle, which suffers from the inability to accept a suppressor, making the MK.23 more practical for stealth and the only suppressed pistol able to still kill helmet-wearing enemies in one shot. The pistol's main drawback is that only two enemies can be executed with it at the same time. It is the only pistol that cannot mark more than two targets. It also has poor accuracy at mid to long range (unlike the real life pistol, which is considered a match-grade weapon), or firing rapidly, but the laser sight upgrade will help with that issue a bit. The MK.23 is Sam's default weapon for early levels of the game, before being replaced by Five-seveN in the Washington Monument mission. Because the player has infinite rounds for sidearms in this game, the MK.23 should serve the player well in early stages.

Tom Clancy's Splinter Cell: Conviction (Upgrades)
Upgrades P.E.C. Points
Extended Mag 300 points
Laser Sight 250 points
Hollow point ammo 250 points


  • Outside of the Splinter Cell games, the MK.23 is also known as the "MK.23 SOCOM"; it is one of the most notable sidearms used by the character Solid Snake from the Metal Gear Solid franchise, another known Stealth franchise much like Splinter Cell.
  • The MK.23 also makes it's appearance in the original Splinter Cell and Chaos Theory as enemy weapons, with the silencer removed.
  • The MK.23 seems to be the standard sidearm for the Splinter Cells in Splinter Cell: Conviction, replacing the Five-seveN.
  • The MK.23 can use special ammunition, e.g. the tranquilizer dart used by a Splinter Cell to knock Sam out.

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