Why Are Roller Delayed Blowback Guns Reliable?
This expert-level analysis delves into the reliability of roller delayed blowback firearms, contrasting them with direct impingement and short/long stroke piston systems. It highlights the historical significance of the STG-45 and MP5, details the mechanics of roller delayed action, and discusses factors influencing reliability, such as ammunition choice and potential break-in periods. The content also explores why manufacturers like HK are shifting away from this system and the enduring appeal of roller delayed designs in modern firearms.










