MP22K, Carbine, and SD

MP22K, Carbine, and SD Features

The MP22K, Carbine, and SD design stands out with its semi-auto .22lr configuration, offering a thrilling shooting experience. Its homemade bolt system ensures reliable performance, while the unique charging handle delivers that satisfying slap every time you rack it.

Key highlights include:

• Innovative Design: A fully custom build that blends creativity with practicality for a standout firearm.
• Robust Components: Features like the barrel block with ramp and retract brace button ensure durability and ease of use.
• Attention-Grabbing Style: A bold look that’s as impressive to show off as it is to shoot.

This design isn’t just about function; it’s about making a statement with every build. Perfect for enthusiasts who crave something extraordinary, it’s a project that combines technical challenge with rewarding results.

Difficulty & Build Time

• Skill Level: Intermediate
• Estimated Build Time: 20-30 hours
• Required Experience: Familiarity with 3D printing, basic metalworking, and firearm assembly recommended

Hardware and Tools Required

Required Hardware

• (1) m1.5 x 10mm screw (front sight post)
• (1 or 2) m3 x 20mm pins (charging handle arm)
• (2) m3 x 18mm screws (barrel block with ramp)
• (3) m3 x 32mm screws (barrel retainer)
• (1) m3 x 8mm screw (fasten ejector block to magwell)
• (2) m4 x 10mm screws (front handguard screws)
• (1) m4 x 35mm screw (bottom hole in handguard)
• (1) m4 x 35mm screw (retract brace button)
• (2) m5 nuts (rear sight)
• (2) m5 x 14mm screws (rear sight)
• (2) m5 x 16mm screws (rear sight)
• (1) 5mm ID spring (rear sight)
• (1) 6mm x 300mm linear rod (bolt guide rod)
• (1) 6mm x 12mm x 19mm linear bearings
• (2) 5mm x 38mm pins (endcap)
• (2) 5mm x 34mm pins (upper portion)

Recommended Tools

• Hand drill
• 1/16” drill bit
• 1/8” drill bit
• 1/4” drill bit
• 15/64” drill bit
• Files
• Two-part epoxy
• Kinetic sand
• Propane torch

MP22K, Carbine, and SD Parts

The MP22K, Carbine, and SD package includes detailed STL files for all printable components, ensuring you have everything needed for a complete build. For optimal results, we recommend printing with high-strength materials like PETG or ABS to withstand the mechanical stresses of a semi-auto firearm. Pay attention to layer adhesion and infill density—settings of 50-70% infill are suggested for critical parts like the bolt and barrel retainer.

Special considerations include ensuring precise tolerances for moving parts like the charging handle and bolt guide rod. Post-processing with sanding or filing may be necessary for a smooth fit. Refer to the included MP22K Build Guide_Final.pdf for step-by-step assembly instructions.

Printer Compatibility & Settings

The MP22K, Carbine, and SD files are compatible with most FDM 3D printers, including popular models like the Ender 3 or Prusa i3. Recommended materials include PETG or ABS for their strength and heat resistance, crucial for firearm components. Use a layer height of 0.2mm and a nozzle temperature of 230-250°C for PETG, or 240-260°C for ABS, to ensure durability.

Ensure your printer bed is leveled and consider using a brim or raft for better adhesion on larger parts. A well-calibrated printer is essential to achieve the tight tolerances required for functional components. Ventilation is advised when printing with ABS due to fumes.

Conclusion

The MP22K, Carbine, and SD design offers an unparalleled opportunity to create a semi-auto .22lr firearm that’s as bold as it is functional. With comprehensive build guides and precise hardware requirements, this project is perfect for intermediate builders ready to tackle a rewarding challenge. Download the files, grab your tools, and start crafting a piece that’s sure to impress at the range or in your workshop.