Tactical-Style EDC Pen (G2 Refill Compatible)

This project requires a G2 refill and a spring (4mm diameter, 18-22mm length). An additional component is provided to accommodate 14-18mm springs. This model is designed for Schneider G2 refills (German brand), with a measured length of 98.3mm. As this is my first pen design, I currently lack access to other G2 refill brands and cannot guarantee universal compatibility. However, refills within ±1mm length variance should function normally. I plan to purchase additional G2 refill brands for future compatibility testing.Due to Pilot's G2 refills adhering to a distinct standard (110mm length, vs. the 98mm norm for most brands), this model is incompatible with Pilot refills. Print Specifications:Requires supportsDifferent wall thicknesses and infills for structural strengthMandatory use of provided 3MF files Assembly Tools:A printed installation tool enables convenient pen assembly/disassembly. The blue circle indicates the printed installation tool, while the green circle marks the co