Help with my project!

I have been working on a little gun test and i have got most of it working and i started to add the use of multiple guns in it. i drew up my shotty and stashed him in the library.
And i made a mousewheel function and i can scroll through the array ok so the i can get the variables of "SCAR, and “Shotgun” ok. I just dont know how to put in a movieclip based on a variable. Thx. i think that this would be less processor intensive the haveing a mc with nested one inside, since i was going to change them to sprites anyway it doesnt matter. but ll put up the zip so you can all get a look. please can someone help me out with this?

This is the link: