U.S. Stevens Model 620 Trench Gun, 12 ga. pump action military gun.  Serial #23138. Excellent condition. 20” Cylinder Bore barrel with has an excellent shiny bore. The blue finish is 95% with spots of freckling .  The receiver and barrel are marked “P over Flaming Bomb” proofs. U.S. mark above the trigger on the left side of the receiver. Heat shield with bayonet lug is in excellent shape. The stock has military sling swivels but has no cartouche or stamps. Green canvas sling. Includes a M1917 Remington marked bayonet in excellent condition.  A very cool piece of WWII history.  Highly collectible! C&R OK.