Hoffman Tactical AR-9 Super Lower

Hoffman Tactical AR-9 Super Lower Features

The Hoffman Tactical AR-9 Super Lower stands out with its innovative adaptation for 9mm builds, focusing on compatibility and ease of assembly. Built on the robust framework of the V3.0 Super AR-15 Lower, this design ensures reliability while introducing Glock magazine compatibility—a game-changer for AR-9 enthusiasts.

Key highlights include:

• 3D-Printed Components: Both the mag catch and ejector are fully 3D printable, reducing the need for external parts.
• Minimal Non-Standard Hardware: The only unique part required is a 3/32" x 1" roll pin for the mag catch, keeping builds simple and cost-effective.
• Two Versions Available: Choose between the Super version (requires brass inserts from the Hoffman Tactical Reinforcement Kit) or the Basic version (no inserts needed), catering to different skill levels and preferences.

As this is the first release (V1.0), note that it’s not fully tested, so proceed with caution and expect potential refinements in future updates.

Difficulty & Build Time

• Skill Level: Intermediate
• Estimated Build Time: 1-2 days (including printing and assembly)
• Required Experience: Familiarity with 3D printing, basic firearm assembly, and safety protocols

Hardware and Tools Required

Required Hardware

• 3/32" diameter x 1" long roll pin (for mag catch)
• Mag catch spring (same as AR-15 mag catch spring)
• Brass inserts (for Super version, from Hoffman Tactical Reinforcement Kit)

Recommended Tools

• 3D printer (compatible with recommended materials)
• Basic hand tools (screwdrivers, pliers, etc.)
• Drill (for potential fitting adjustments)
• Calipers (for precise measurements during assembly)

Hoffman Tactical AR-9 Super Lower Parts

This downloadable folder includes the V1.0 AR-9 Super Lower files in two distinct versions: the Super version (with brass insert reinforcements) and the Basic version (without inserts). These STL files are designed for 3D printing, allowing users to create a functional AR-9 lower receiver at home. For detailed assembly guidance, a PDF build guide is available at the provided link.

For optimal results, print with high-strength materials like PETG or ABS to ensure durability under stress. Use a layer height of 0.2mm or finer for detailed components like the mag catch and ejector. Ensure proper bed adhesion and consider adding supports for overhangs to maintain structural integrity during printing.

Printer Compatibility & Settings

The Hoffman Tactical AR-9 Super Lower files are compatible with most FDM 3D printers capable of handling durable materials like PETG or ABS, which are recommended for their strength and heat resistance. PLA is not advised due to its lower durability for firearm components. Ensure your printer has a build volume sufficient for the lower receiver dimensions (check exact specs in the files).

Recommended print settings include a nozzle temperature of 230-250°C (for PETG/ABS), a bed temperature of 80-100°C, and an infill density of at least 50% for structural integrity. A well-calibrated printer with good layer adhesion is crucial, as this design demands precision for functional firearm parts. Always test-fit components post-printing and sand or adjust as needed for a seamless assembly.

Conclusion

The Hoffman Tactical AR-9 Super Lower offers an exciting opportunity for 3D printing and firearms enthusiasts to craft a custom 9mm AR platform with Glock magazine compatibility. With its innovative design, minimal hardware requirements, and detailed build instructions, this project is a rewarding endeavor for intermediate builders ready to tackle a cutting-edge DIY firearm. Download, print, and assemble with care, keeping in mind this is a first-release design that may evolve with future updates.