haha, yes sorry for my moment of dyslexia. You can easily find a "free version" if one were so inclined but if you are not ok with this then you would have to toss out the idea. (But you are missing out :P) But I would defiantly have to disagree with how easy it is to use. One or two quick tutorials...

I would suggest you give solidowrks a quick try, it is an amazing program and extremely easy to use. It is an actual 3D CAD/CAM modeling software and these kind of applications are specificaly what it is used for. If you ever decide to make a gun with moving parts Solidowrks can simulate movements. ...