Ultra-Mini 9mm Laser Cartridge

I’m building a laser “bullet” for atış antrenmanı and I need every element—from enclosure to electronics—worked out so it can be manufactured for no more than a real 9 × 19 mm cartridge’s footprint.

Core behaviour
• When the tabanca iğnesi touches the rear switch, a 3 V red laser on the front must light only for that contact window.
• The body will be plastik yet tough enough to survive repeated dry-fire cycles.

Power & charging
A tiny rechargeable cell sits inside and must reach full capacity in ±1 saat through two rear pogo-pin pads fed from a 5 V dock. I’ll rely on your charging-IC choice and protection topology, but the solution has to be buildable with widely stocked components.

Deliverables
• 3D model (STEP) of the complete round, ready for SLA/FFF printing or moulding
• Gerbers, PCB layout, schematic, and annotated BOM
• Simple test firmware or MCU config, if an MCU is required, proving hit-to-laser latency