Mk 23

The Heckler & Koch Mark 23 is a semi-automatic large-frame pistol chambered in .45 ACP. It serves as Bradley's secondary weapon in all of the game's missions.

Details
The Mark 23 in the game is referred to as the "Mk23 Silenced Pistol", and it's always equipped with a laser and suppressor except during the Basic Training, where it's equipped with a yellow-painted muzzle brake instead and is referred to as the "Mk23 Pistol". It is the only pistol in the game that has a laser attached to it.

The Mark 23 has a high accuracy and low recoil, suitable for stealth kills thanks to its suppressor and laser. It is also pretty powerful, able to incapacitate Connors with only 2 head shots, more powerful than most assault rifles, SMGs and LMGs. It can also be useful as a backup weapon as it has a high rate of fire comparable to that of most suppressed SMGs, but keep in mind that it has a very limited ammo supply so mind your shots.