K'nex SPAS-12 *CONCEPT*

This is a concept I thought of, it was originally single-shot, but I think you can slip a magazine into in (look at the 4th picture). Does not have a working pump, sorry. :( It is supposed to look similar to the Half-Life 2 shotgun, which is a SPAS-12. I'd like for someone to build it, please, as I do not have the parts to complete it. If you add a magazine, you get bonus points. If you go CRAZY and add a drum magazine, I will marry you. :D (5-stars on every one of your instructables and a subscription if you choose to be the first one to build it, and tell me about [pic is not necessary, but wanted] in the comments section below) So, here it is: