POTD: Heckler & Koch Roller delayed blowback system
It’s time to get a little bit technical in Today’s Photo Of The Day.
You are looking at the Heckler & Koch‘s roller-delayed blow-back systems for the 7.62×51 G3, 9×19 MP5 and the 9×19 P9S.
At the bottom you have the bolt from a .308 G3, in the middle one from a 9×19 mm MP5. The smallest one is of course from the 9 mm P9S.
From rifle in a major caliber to a sub-machine gun to a pistol.
If you want to learn how the system works, there’s a great article here from Loadoutroom or from Wikipedia.
The picture is from Germany and Schrombo, used with permission. Please check his Instagram or Facebook out.
Ex-Arctic Ranger. Competitive practical shooter and hunter with a European focus. Always ready to increase my collection of modern semi-automatics, optics, thermals and suppressors. TCCC Certified. Occasionaly seen in a 6x6 Bug Out Vehicle, always with a big smile.
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Huh, didn’t think the rifle one would look like that, ie small and primitive. Interesting that it’s enough.
I love how it is on CZ52 pistols, which is locking, not just delay. Unless I’m missing something a striker version of that could have way lower bore height
how i LOVE the roller delayed blow back. IMO, its the pinnacle of operating systems for firearms.