It's a military defesive automatic rifle, with experienced solider, it's a perfect gun to go war in the middle east, or anywhere in the world. But this is one of the most popular guns in the world, and the film producers are like it too.
There isn't any way to make Shooting lego guns with my lego collection. I only have classic, and original blocks like 2x4. But soon I'll get some Lego Technics stuff, It will be posssible to make shooting guns. But I have lots of gums, so I can make rubberbands and else for the perfect model. Oh and by the way, my creations will be colourful :).
But as I said, It's just a model.