Understanding the Roller-Delayed Blowback Mechanism: Spotlight on HK P9, Korth PRS, HK MP5, and HK G3
Roller‑delayed blowback is a clever mechanical solution that temporarily holds the breech closed after firing, allowing chamber pressure to drop safely before unlocking. This system—used in the HK P9 pistol, Korth PRS handguns, Heckler & Koch’s MP5 submachine gun, and G3 rifle—delivers lighter weight, reduced recoil, and exceptional reliability across pistol and rifle platforms.
Michael Graczyk
November 30, 2023
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