By Eric B
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 post POTD: Heckler & Koch Roller delayed blowback system appeared first on The Firearm Blog.
Source:: The Firearm Blog