The is my (kind of) lego version of a M1897 Trench Gun. It is fully functional and it fires air soft bb's. It has a pump which pushes a ram back, letting bb's fall into the chamber, and when the trigger is pulled, it releases the ram, which in turn, "rams" or pushes the bb's out of the barrel, simmulating a shotgun's shell being fired with a spray of bb's.
About this creation
First Person View (FPV) of the shotgun.
View of the slide cocked back with the bolt locked in place.
The "pump" grip which is pulled back to cock the gun.
Inside view of the slide cocked back and the bolt locked in place
Inside view of the slide at rest and the gun not cocked.