B-Variant Hardware Kit

(1 customer review)


Contains all the hardware needed to assemble a B-Variant (a design by Steven Rupp). Darts, magazines and printed parts sold separately.

Coming Soon
Coming Soon
Aluminum Trigger (+$15.00)
U Channel Coloring
SCAR Hardware
Rubber Grip Sleeve (+$10.00)
Black Anodize (+$13.00)
Carbon Fiber Wrap (+$15.00)
New Anodize Colors Coming soon
SCAR (+$8.00)
BCAR (+$18.00)
Product total
Options total
Grand total


– Contains all hardware needed to assemble a B-Variant Caliburn, designed by Steven Rupp, based off of the U-Caliburn by CaptainSlug.
– Assembly instructions provided by us by assembly video and step-by-step.
– Default barrel is 14” length 0.527″ ID barrel
– Compatible with Caliburn springs and Pro-series Turf springs
– Hardware differs slightly from U Caliburn such as length of threaded rods and holes in U-Channels.
– If ordered with 509 or 495 barrel, will include chambered barrel receiving end
– Kit includes aluminum ramcore with o-ring notch and skinny-pusher
– Compatible with original B-Variant files linked on Thingiverse
– Base STL files are also included with hardware kit

Assembly Guide: B Variant Build Guide

Optional Add-ons:
– Additional springs can be purchased here
– SCAR Barrel
– Ported MuzzleBrake
– Varying barrel types
– and more!

Darts & Magazines: 
– Compatible with full length darts & elite style magazines
– Compatible with half darts & short-dart Magazines with 

Access to files for printing your own parts available here: Print Files Download

Additional information

Weight 2 lbs
Dimensions 28 × 4 × 4 in

1 review for B-Variant Hardware Kit

  1. Kevin Mason (verified owner)

    I would say that the kit, video and help have been 5 star for sure. You guys got me what I was after and got back to me in a timely fashion. Helped me with everything I needed

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