SFFA_V2_AR15

SFFA_V2_AR15 Features

The SFFA V2 is packed with groundbreaking features that set it apart in the realm of 3D-printed firearm components. Its primary function as a select-fire drop-in auto sear transforms a standard AR-15 into a machine gun, offering full-auto capability when paired with the provided 3D selector.

• Versatile Selector Options: Use the included 3D selector for SAFE, SEMI, and FULL AUTO modes, or retain the MIL-SPEC selector for a traditional SAFE and FULL AUTO setup.
• Legal Design Consideration: Without the sear installed, the 3D selector operates as SAFE, SEMI, SEMI, ensuring it remains compliant and prevents hammer follow in the third position.
• Community-Driven Innovation: Backed by The Gatalog, this file connects you to a passionate community of builders at thegatalog.com for support and collaboration.

This design prioritizes functionality while offering a glimpse into advanced firearm mechanics. Note that this is classified as a machine gun component, and users must be aware of legal implications and potential consequences.

Difficulty & Build Time

• Skill Level: Advanced
• Estimated Build Time: 8-12 hours
• Required Experience: Prior experience with AR-15 assembly, fire control group modifications, and 3D printing precision components is strongly recommended.

Hardware and Tools Required

Required Hardware

• MIL-SPEC AR-15 Fire Control Group (FCG)
• Standard AR-15 lower receiver
• 3D-printed components from the SFFA_V2_AR15 file (selector and auto sear)

Recommended Tools

• 3D printer with high precision capabilities
• Basic firearm assembly tools (punches, hammers, and screwdrivers)
• Calipers for precise measurement of printed parts
• Finishing tools for post-processing 3D prints (sandpaper, files)

SFFA_V2_AR15 Parts

The SFFA_V2_AR15 file includes STL files for the select-fire drop-in auto sear and the custom 3D selector, both critical for achieving the desired functionality. For optimal results, print these components with high infill (80-100%) to ensure durability under mechanical stress. We recommend using strong materials like PETG or ABS to withstand the rigors of firearm operation.

Pay attention to layer adhesion and avoid warping during printing, as precision is key for proper fitment within the AR-15 lower receiver. Post-processing may be required to smooth surfaces and ensure seamless integration with MIL-SPEC components. Refer to the assembly guide animation on Odysee (linked in the README) for visual installation instructions.

Printer Compatibility & Settings

The SFFA_V2_AR15 components are compatible with most FDM 3D printers capable of high-detail printing, such as Ender 3, Prusa i3, or similar models. For materials, PETG or ABS are highly recommended due to their strength and heat resistance, essential for firearm parts. PLA is not advised as it may deform under stress or heat.

Set your printer to a layer height of 0.1-0.2mm for fine detail, with a nozzle temperature of 230-250°C for PETG or 240-260°C for ABS. Ensure proper bed adhesion and consider using a brim or raft to prevent warping. A well-calibrated printer is crucial to achieve the tight tolerances needed for functional firearm components.

Conclusion

The SFFA_V2_AR15 offers an unparalleled opportunity for advanced 3D printing and firearms enthusiasts to push the boundaries of AR-15 customization with select-fire capabilities. With detailed resources like the PDF build guide and community support at thegatalog.com, builders can tackle this complex project with confidence. Always prioritize safety and legal compliance, and explore the assembly animation on Odysee for a seamless build experience.