PBS = Russian: Pribor Besshumnoy Stryelbiy (English: Device for Noiseless Shooting)
14mm "-" (CCW) Thread.
Contains sound-absorbing cotton ring for reducing the shooting noise of the AEG or using as a barrel extension for covering the longer inner barrel.
Recommended for the AKS74U or AK type Airsoft gun.
Weight with box(g): 444