The 411 on Moscow’s quietest
Russian firearms expert and historian Maxim Popenker has a fascinating piece over at Weapons Man about Russian Internally Suppressed, Captive Piston Quiet Weapons. And it is well worth the read
From the piece:
PSS internally suppressed pistol with action open and magazine of ready rounds.
“Kanarejka” (Canary) system, mounted below the AKS-74U assault rifle.