As far as I know, there aren't any blueprints that tell you the measurements. Most of the builds here are from replica weapons, resin copies and toy conversions. Most of the the member builds were from taking precise measurements from photos and converting them to the correct size, or blueprints/drawings obtained from Google, or fan/movie books.
BTW...It is generally frowned upon to join this site, and, as a second post, ask for an easy way for a solution to your problem without even considering Google or looking through the many threads this website has to offer.
But, welcome to the site and please participate and share in discussions. You will gain valuable insight, good advice and support for your project once people get to know you.
TazMan2000
