The oldest is a Gewehr 1888, complete with bayonet.
Those can come in handy sometimes. You never know when you're going to run into a hard-charging deer. Hand to horn combat, you know!
"An archer sees how far he can be from a target and still hit it, a bowhunter sees how close he can get before he shoots." It is certainly easy to use that same line of thinking with firearms. -- Unknown