Pistol Suppressor

The is a muzzle attachment for the IJ-70, CR-75, Mlock-91, FX-45, Kolt 1911, Deagle, CR-61 Skorpion, SG5-K and the USG-45 in DayZ Standalone. The significantly reduces the sound and muzzle flash produced by the weapon when it is fired.

Durability
You can see below how many rounds can be shot until the is ruined.

Trivia

 * The model in-game is a Gemtech Tundra 9mm suppressor, although the suppressor works on multiple pistol calibers and barrel sizes.