The best PCC Operating Systems: Blowback, roller-delayed, gas, radial delayed.
This review compares four primary operating systems for Pistol Caliber Carbines (PCCs) and Submachine Guns (SMGs): radial-delayed, straight blowback, roller-delayed, and gas-operated. Each system's pros and cons are detailed, with specific examples like the CMMG Banshee (radial-delayed), B&T SPC (blowback with hydraulic buffer), HK SP5/Stribog (roller-delayed), and Sig MPX (gas-operated). The host ultimately favors the B&T SPC for its balance of reliability and smooth shooting.









