Not to nitpick or anything (which is what I'm doing actually...) but chainmail does not protect from piercing/thrusting damage. You see the blade will strike only a couple of rings and the rings will break and the knife plunges into the body. Chainmail does protect you from slashing attacks as the pressure and force of the blade is distributed between all of the rings.
4ft rifles lol.
That'd be too easy for people to run up and do damage. Melee is about being confused and frantic, not something that's done on its own without any worry.
I think if they could code the guns with collision modelling. Plus something where only of the bullet comes out the barrel it will do damage. Correct me if I am wrong, currently all bullets come direct from the helmet tip. if the bullets do not do damage until the leave the equivelent of the barrel length of your gun then I think it would clear some of this mess with melee up.
concussed
that would involve your brain smacking against your skull, which would take a rifle butt to the head to do, no stab will create that much force lol, and if it did