CHANGE NOTE 7/18/18: Slight improvement in aftermarket magazine compatibility with magwell inside profile.
CHANGE NOTE 6/06/18: 4-40 thin hex nuts have been completely removed from the hardware set. 4-40 screws now simply drive into the prints. Replaced "Pizza Table" and "Stock_Alt" with "Stock_Kiri". Monolithic magwell is going to be the standard magwell from here forward. SEAR5 and Ram2oe should be printed with 2mm perimeters.
OUTDATED PARTS MOVED TO A SEPARATE ZIP FILE.
ALL BASE COMPONENTS ARE IN THE 3DP_###### zip file except for the ramrod.
"Ram2o" can only be printed out of ABS or Polycarbonate.
"Ram2on" can be printed out of PLA, PETG, or anything else.
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 200 Micron or smaller.
SEAR5 and RAM2on should be printed with 2mm perimeters. Ram2o should only be printed out of ABS.
This Blaster design is also offered in a version you can machine out of polycarbonate if you are interested in crafting one from scratch. The write-up and machining templates for that version are available at: http://captainslug.com/caliburn.html
Assembled Blasters and Blaster Kits are available for sale as commissioned items.
Hardware kits to allow you to assemble on you've printed yourself are restocked nearly every weekend.
All of the above are for sale on Etsy as well as eBay.