Remixed this from Danonator's excellent Hellboy Prop (http://www.thingiverse.com/thing:71235) and added in the ammo from (http://www.thingiverse.com/thing:260664) and the grip and medallion (sorry, can't seem to find the original designer). I altered the following files to make it a little more "authentic": I used springs from Harbor Freight for the release which work great (when you depress the release the cylinder pops open). It is a little more involved than "print and play", but works GREAT! PLEASE NOTE: THIS IS A PROP. THIS HAS NEVER / WILL NEVER FIRE REAL AMMUNITION OF ANY KIND. Print out one of all files. Using the two back-strap to frame pegs, glue the back-strap to the frame. Use ABS slurry or epoxy since this part will be under stress from the spring in the frame. Use a screw to attach the Cylinder release to the frame, Place small spring (pen spring works great) underneath the cylinder release to give it some tension. The spring should fit into the recess in the frame. Place medium spring in recess on top of frame and use ABS slurry or epoxy to glue (let it sit overnight to set strongly or it may pop loose under heavy use) Insert small finishing nail / brad in the hole in the rear of the back-strap so that the cylinder release can grab it. You may want to glue this in place as well for strength. Adjust how far the nail sticks out of the back-strap so that it releases when you depress the cylinder release. Assemble everything. When you want to load / unload, depress the cylinder release and the spring glued into the frame will "eject" the cylinder forward. To close the revolver, press the release, close the frame, then release the cylinder release so that it grabs the nail / brad in the back-strap.