USFA .22LR Zip Gun – Fully 3D Printed, Compact & Functional DIY Model

  1. Model Name: USFA Zip Gun – .22LR Working Model
  2. Type: DIY single-shot pistol, 100% 3D printed (excluding metal parts where required)
  3. Caliber: Designed for .22 Long Rifle (.22LR) ammunition
  4. Design: Compact, minimalist frame inspired by the original USFA Zip
  5. Features:
    • Detachable barrel insert (for legality and testing)
    • Functional trigger mechanism
    • Internal striker-style firing
  6. Print Specs:
    • Designed for FDM printers
    • Optimized for PLA+ or ABS for strength
    • Supports required for a few parts
  7. Assembly:
    • Simple tool-free or minimal-tool build
    • Few metal components (springs, firing pin recommended)
  8. Safety:
    • For educational/demonstration use only
    • Always follow your local laws
  9. Download Format:
    • STL files in a single ZIP
    • Includes ReadMe with printing and assembly guide
  10. License:
  • Purchase to download – Public Domain / CC0