If you own a roller-delayed blowback rifle like the PTR91, or ever had the pleasure of using one, you will probably note right away that it is one of the softest recoiling 308 rifles you will ever fire. These rifles are known for their top notch reliability and tough and robust nature regardless of your neglect. That being said, these rifles are not devoid of issues. It is important to understand how these weapons work in order to diagnose the issue. Knowing is half the battle in this case. The other half of the issue is getting the problem fixed whether it is retapping the barrel or just breaking it in further with hotter ammo to wear in the rollers and the locking piece.
PTR91, HK 91, G3 Malfunction Sources
