This is a picture of some old 1900's in a repair shop.
New guns have a better fire rate and have more attachments you can say. Old guns had horrible reloading and a lack of ammunition. New guns have enough and a good amount of ammunition.
What guns?
Every firearms maker is required to stamp their name, model number and caliber on the firearm somewhere. For hand guns it is usually found on the frame. For long guns, the make and model is usually on the receiver and the caliber on the barrel. Old pistols and some rifles (usually made before 1900) might not have this stamped on it.
Some old stone age names age olga, ayla and gam.
Scene from 'Old Kentucky' - 1900 was released on: USA: November 1900
Two Old Sparks - 1900 was released on: USA: 7 April 1900
Elizabeth
How the Old Maid Got a Husband - 1900 was released on: USA: May 1900
The Two Old Sports - 1900 was released on: UK: February 1900 USA: 1903
If you see a gameplay vid E3 (I've seen some) it shows that the player is based in Vietnam, so expect some of the old guns, that doesnt mean that theres new solutions. Some MW2 guns............Some COD W@W guns: Wunderwaffe DG-2, Raygun, etc.
21 for Hand Guns. 18 for Long guns.