C4 Caliburn 4 Hardware Kit

(8 customer reviews)


Contains all the hardware needed to assemble a C4 (Caliburn 4). *Necessary Printed Parts NOT included*

Aluminum Trigger (+$15.00)
Aluminum Sear (+$20.00)
SCAR Hardware (+$8.00)
Rubber Grip Sleeve (+$10.00)
Aluminum Rambase (+$20.00)
Plunger Black Acetal (+$21.00)
Plunger White Acetal (+$21.00)
Plunger Aluminum (+$31.00)
Product total
Options total
Grand total


The Caliburn C4 is a homemade Nerf blaster originally designed by CaptainSlug. Pump action, mag-fed, variable fps. Darts, mags, and accessories sold separately.

Kit includes all hardware necessary to build a C4.
Necessary Printed Parts NOT included
– STL files will be included with kit purchase.
– If you select colored flatbars, you will receive a set of 6 bars since 2 are completely covered and not visible.

Blaster Features:

  • More dry-fire safe than predecessor. Great for beginning nerfers.
  • Quick-access buttplate for easy spring swap to adjust power
  • Compatible with both half and standard (elite) dart types with passive magwell adapter
  • Increased durability & rigidity from the previous versions
  • Compatible with most standard picatinny attachments and Caliburn Lower Stock Spacers
  • All Flat bar construction
  • Tool-free passive talon/nstrike mag adapter
  • Faster spring-swaps
  • Optional air-brake plunger feature
  • Maintains the takedown feature
  • Optional o-ring collet muzzle for fast barrel swaps
  • Supports elastic and extension springs for accessories
  • Higher rigidity mixed-print-orientation grip assembly
  • Still compatible with Tooth-And-Nail and other aftermarket parts



  • Darts NOT included. Darts must be purchased separately.
  • Compatible with standard nerf brand darts, as well as short darts
  • Recommended darts: Worker Gen3 Darts


  • Compatible with most standard picatinny-compatible attachment
  • Compatible with all addons featured on the listing.

Additional information

Weight 2.0625 lbs
Dimensions 18 × 2 × 2 in

8 reviews for C4 Caliburn 4 Hardware Kit

  1. Austin Huseby

    Awesome 10/10. Only issues encountered during building where stupidity on my part.

  2. Casey Tackman (verified owner)

    The Caliburn 4 hardware kit worked great with my build. Would highly recommend for those who are looking to build their own caliburn. All the parts fit together great, with several spare pieces.
    Build video on YouTube was very helpful for reference during assembly.

  3. Anonymous (verified owner)

    The kit works exactly like it should and I have had no issues with functionality.

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