Contrary to the myth, triangle blades such as these are not banned by the Hague or Geneva Conventions. An additional protocol to the Geneva Conventions of 1949 bans the use of “bayonets with a serrated edge,” but does not mention knives or triangle blades. Straight off the military weapons classifications.
I have not said anything war crime related. Triangular bayonets are the closest thing in my speech to a war crime, however they are not seen as a war crime when classified as a combat knife.
The user is probably referencing the more effective Akm based off of the picture below. Also, a Kar and Gewehr (the gun in the photo is either one) can be effective at close range, especially with that bayonet that is mounted on it. The gun in question also has an internal magazine that hold multiple bullets, and the bolt action feature means it can be fired relatively fast. The furries would have golf ball sized holes blown through them, possible triangular bayonet wounds as well. The man would be just fine, as he has a combat knife (assumption based if the uniform) and the furries would not be doing any bludgeoning.