EZ22 open beta by plastic blasters V0.93

EZ22 open beta by plastic blasters V0.93 Features

The EZ22 stands out with its user-friendly assembly process, tailored for 22lr compatibility with a fully 3D-printed AR15 upper and bolt. This beta version includes critical updates like a firing pin adjustment (moved down 0.5mm) and an ejector slot tweak (moved up 0.5mm), addressing previous barrel shimming needs for enhanced performance.

Key highlights include:

• Reusability: Easily remove and reuse barrel liners from older versions by softening PLA+ at 250°F and scraping off old JB Weld.
• Custom Fit: Sand the ramp for a snug fit and secure with JB Weld; an optional M3 bolt adds extra stability.
• Optimized Feeding: Adjust the bolt’s round pickup or ramp angle if feeding issues arise, and use the provided mag design for smoother cycling.

This design also incorporates a remixed magazine inspired by popular models, utilizing a CMMG mag spring for reliable operation. With a pre-chambered Chaszel liner recommended, the EZ22 ensures precision and durability for every build.

Difficulty & Build Time

• Skill Level: Intermediate
• Estimated Build Time: 8-12 hours
• Required Experience: Basic knowledge of 3D printing, firearm assembly, and minor finishing skills like sanding or filing.

Hardware and Tools Required

Required Hardware

• Pre-chambered Chaszel barrel liner (recommended)
• JB Weld for securing the liner
• M3 bolt (optional, for ramp stability)
• CMMG mag spring for the remixed magazine

Recommended Tools

• 3D printer for printing components
• Oven (for heating PLA+ to 250°F for liner removal)
• Razor blade (for scraping old JB Weld)
• Sandpaper or file (for adjusting ramp and bolt fit)
• Basic hand tools for assembly

EZ22 open beta by plastic blasters V0.93 Parts

The EZ22 open beta package includes STL files for the AR15 upper, bolt, and a remixed magazine design that blends the best features of popular models. Print settings should prioritize durability—use a high infill percentage (50-80%) and at least 5-6 wall layers for structural integrity. PLA+ is referenced for liner removal, but stronger materials like PETG or ABS are suggested for long-term use.

Special considerations include ensuring the ramp fits snugly by sanding as needed and verifying the bolt closes fully without interference. The provided magazine design is optimized for compatibility, but minor filing may be required if feed issues occur with other printable mags.

Printer Compatibility & Settings

The EZ22 design is compatible with most FDM 3D printers capable of handling detailed prints, such as Ender 3, Prusa i3, or similar models. Recommended materials include PETG or ABS for enhanced strength and heat resistance, though PLA+ can work for initial testing. Use a layer height of 0.2mm, a nozzle temperature of 220-240°C (material-dependent), and a bed temperature of 60-80°C to ensure optimal adhesion and detail.

Ensure proper calibration of your printer to avoid dimensional inaccuracies, especially for tight-fitting components like the ramp and bolt. Supports may be necessary for overhangs, and a brim or raft can help with bed adhesion for larger parts.

Conclusion

The EZ22 open beta by plastic blasters V0.93 offers an exciting opportunity for 3D printing and firearms enthusiasts to build a functional 22lr AR15 upper with minimal hassle. With its finalized core design, user-friendly tweaks, and community feedback focus, this beta version is a stepping stone to a polished final release. Download the files, follow the detailed PDF guide, and join the journey of refining this innovative printed gun design today!