FILE SET IS IN INCHES.
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 an Open Source Non-Commercial license 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.
The Following parts however ARE REQUIRED to be printed at 100% infill: Bolt1, P1, P2, P3b, Ram2, Sear, Spreader, TGuard2, and TriggerAlt.
This Blaster design is also offered in a version you can machined 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
Hardware kits and Full Blasters are available for sale as stock becomes available. I'm producing these myself in what remains of my free time, but the intent is to have at least 2 blasters and 2 hardware kits in stock every week on average. Otherwise just check my eBay store every Weekend for inventory being added, or ask about being added to the waitlist.
http://www.ebay.com/usr/captainslug
http://nerfhaven.com/forums/topic/27193-caliburn-mag-fed-pump-action-springer/