The AKS-74UB ("B"—Russian: бесшумный; Besshumniy or "silent") is a sound-suppressed variant of the AKS-74U adapted for use with the PBS-4 suppressor (used in combination with subsonic 5.45×39mm Russian ammunition).
AKS-74UB ("B"—rusisht: бесшумный; Besshumniy ose "pa zhurmë") është varianti silencioz i AKS-74U i pajisur me supresorin PBS-4 (i përdorur në kombinim me municionin subsonik rus 5.45×39mm).