PTR Industries in South Carolina is building the PTR91, a semi automatic version of the well designed robust Heckler and Kock 7.62mm NATO battle rifle. Once used by the German military, the G3 has been popular in the export market, being adopted by the armed forces of over 40 countries. If you watch the evening news you will see that Mexico, Pakistan and Iran all still make … [Read more...]
delayed blowback
France Replaces Bullpup With HK416
The bullpup rifle was developed to answer a number of military issues that armies around the globe needed to have answered. Today, some of the militaries that adopted bullpups in the 80's and 90's are now going to traditional style rifles. Bullpups were popular in concept due to the fact that much of the world in the 70's and 80's were training in the concept of mechanized … [Read more...]
How It Works: H&K’s Roller-Delayed Blowback Operating System
The roller-delayed blowback system can be confusing at times to understand, but I hope this video is educational in understanding how G3/MP5 type actions work. The term "roller-locked" is an incorrect description due to how this system is designed. Unlike the FAL and other popular .308 rifles of yesteryear, the G3/PTR91/C308 do not use a gas system to cycle the heavy .308 … [Read more...]