Here are 3 random melee weapons, 1st is a bit of fantasy on the Katana, 2nd a Hand and a half sword (Yes actual term), 3rd. A straight up Shank :)

Then I have a Mosin Nagant with 6 Variants/Upgrades. Then a small animation for Muzzle flash.

1: Classic Nagant, 2: Cartridge Carrier, use this to upgrade Max ammo capacity. 3: Pistol Grip, Hipfire/Accuracy 4: Close quarters Nagant, Less Accuracy and damage, Less weight, massive melee damage. 5: Classic Nagant with Magazine instead of Clip, Ammo Capacity 5 ->10 (or whatever you want). 6: Scope, More accuracy, less hip fire (if used) 7: Scope and Magazine.

My take on the Mosin Nagant.