This is printed from the file from www.printedfirearms.com With the crowns removed. I have added new files that allow the parts to be attached using 8-32 7/16 flat head machine screw. I cut the crowns off and turned them to give better support or clamping with out braking. They should be printed using ABS that way the parts can be glued using acetone to soften the ABS and making a solid bond of the parts.