Imperial Scout Trooper Blaster or hold out blaster was featured in Star Wars Return of the Jedi, used by biker scouts with holsters on their lower legs. It is one of the smaller blasters in Star Wars and is meant to be small, you shouldnt be able to fit your whole hand into guard. This was based on the original model from the sketchup warehouse, though I have modified it slightly to be usable as a 501st Legion prop http://sketchup.google.com/3dwarehouse/details?mid=72ded866d16e9d708a4d09bb2d1ae666&prevstart=0
I have sliced this to be optimal for printing on a 20x20 sized bed. Ideally you need to be able to glue each part together and depending on the accuracy of your printer you may need to sand the parts a little to get a good seal.
I have uploaded a new scope bodies STL this no longer has the scope Hex nuts on which I found didnt print too well on the bodies and tended to break off too easily, The new scope bodies now have holes to place the corresponding hex nuts printed in the small parts STL