Fallschirmjägergewehr 42

Background info
See here, this is designed to fit a key niche role where you gotta bring and LMG and a Semi-auto rifle but can only carry one. The FG-42 is the best for this kind of situations. Mostly for Para jumps behind the hoards of the Undead, you can be sure that the Fg 42 is the best weapon for the job.

It's lightweight and can hit hard and shoots at a jaw-drooping 900 RPM. Combined with the effectiveness of a Scope and the element of surprise, anyone would be sorry to have encountered this weapon, be they Undead or another living person.