Knex shotgun

Got a new idea for a gun, its the shotgun from the game halo, it will have a little trap door thingy, which will reveal a sort of hopper thingy, which i think can hold about 8 white rods, give or take a few, it will have a pump, that not only pushes the firing pin back, but also loads a bullet, with the pressure of the pump stopping the bullet from falling into the barrel, and when the pump is released the bullet will be loaded, and it will be a true trigger, not alot of new things, just a couple of things switched around, yes this will be my first gun, but i will have to learn to build a pump action gun before ANYTHING starts happening, thank you for reading this Yerjoking

sonds like a real shotgun try to buld it u shold try tomake shells insted of a clip like on a real shotgun