From The TimeSplitters Wiki

Silenced Luger
Ammo	7/60
Fire Rate bullets per sec/cartridge time	N/A
Reload Time	N/A
Damage (per Single Shot) Head/Body/Leg	N/A
Type	Pistol
Zoom	None
Primary Fire	Fires bullets
Secondary Fire	Fires bullets
Games	TS2

The Silenced Luger only varies slightly from its non-silenced counterpart. This version of the Luger has a quieter shot, similar to the Silenced Pistol. It also does slightly less damage than the non-silenced Luger. This gun is significant because there is no way to unlock it for use in custom weapon sets. It is present only in certain Story levels, missions and some pre-made sets for Arcade Custom. It is debated whether this was intentional or a mistake of the game programmers.