Could be. WE only had a 7.62mm NATO (.308). They were built by the armorers with a Remington 700 receiver married to a match barrel. We used an Unertl scope and we were authorized to use deadly force to stop people from taking a picture of one.
You had to use a NATO round because you couldn't shoot an enemy combatant with anything else. They are designed not to expand too much or to fragment so that the person has a better chance of survival and not getting maimed too bad if you don't kill him outright. Them were the rules of war.
Sorry about the rifle slide, I'm done now.
Gun discussions are always enjoyed.