"Ram2o" can only be printed out of ABS or Polycarbonate.
"Ram2on" can be printed out of PLA, PETG, or anything else.
"Ram2of" Is the standard ramrod base for use with the aluminum ramrod core (now part of the standard hardware set).
"Milan Coupler Alt" Should be printed out of ABS. However it will be 20% stronger if printed upright wth supports.
Blaster is compatible with FULL-LENGTH and Half-length dart magazines. It is also capable of loading 1 to 4 darts at a time by simply cycling the breech more than once per priming stroke.
The Caliburn is a Mag-Fed Pump-Action Homemade Nerf Blaster design released as a PUBLIC DOMAIN file set by Captain Slug (http://www.captainslug.com).
WARNING: This blaster MAY NOT BE SAFE FOR INDOOR PLAY. Even with the weaker spring, the o-ring removed, and firing full-length darts this blaster will easily shoot faster than 150+ fps. So keep this in mind as to where and when this blaster is used. It can and will produce welts at point-blank range.
You are welcome to and encouraged to modify the files in any way you want. The Majority of the parts can be printed with infill as low as 20% in PLA, but I would recommend printing in layers of 300 Micron or smaller.
Assembled Blasters, Blaster Kits, Hardware kits, and accessories are available for sale on Etsy.