Winchester Model 1897 pump action shotgun (AKA the Trench Gun) with bayonet lug for the 16 inch/40cm M1917 sword bayonet. Designed pre WWI and brought into service when the US realised just how brutal trench warefare was and how important the need for close range firepower was whilst fighting in a trench.
Atlantic Firearms LLC: Vepr 12 Gauge Shotgun FS - Semi Auto Shotgun with a Fixed Stock. Comes With One 5 Round Magazine. Very durable and reliable shotgun based on the Famous AK 47 action . These guns have the ability to accept quick change detachable magazines that are offered in 5 ,8 , 10 & 12 round capacity's. (Saiga Shotgun)