Wisp

Wisp Features

The Wisp stands out with its near-complete printability, allowing users to create a .22LR bolt-action firearm using minimal non-printed hardware. Its design focuses on compatibility with standard AR-friendly uppers, ensuring seamless integration with existing AR parts for a familiar build experience.

Key highlights include:

• Barrel Adapters: Supports multiple configurations, including adapters for Mossberg 702 and 10/22 barrels, with a 16mm barrel option added in the V1.0 release.
• Reinforced Components: Updates like reinforced stock risers, bolt handles, and attachment plates with screw mounts enhance durability.
• Customizable Stock/Brace: Offers printed stock or brace options with specific hardware for a tailored fit and function.

Each version update, from V0.1 to the official V1.0, reflects meticulous improvements, such as updated DXF files and removal of problematic bolt catch cutouts, ensuring a smoother assembly process.

Difficulty & Build Time

• Skill Level: Intermediate
• Estimated Build Time: 2-3 days
• Required Experience: Familiarity with 3D printing, basic firearm assembly, and AR platform components is recommended.

Hardware and Tools Required

Required Hardware

• Assorted Screws and Nuts: M3x8 (1) for ejector, M3x12 (5) for handguard and mag, M3x55 (1) for firing pin, M3 nut (1) for firing pin, M4x6 (1) for hammer, M4x12 (1) for bolt, M4x20 (1) for stock/brace button, M4x30 (1) for brace hook, M4x35 (2) for stock/brace hinge, M5x30 (1) for stock/brace mount, M4 nuts (2-3) for stock/brace, M5 nut (1) for stock/brace mount.
• Heat Inserts: M4x6x6 for bolt, optional M5 for grip.
• Springs: Compression spring (4mm x 15mm, 2) for firing pin and ejector, stock music-wire steel (11" long, 0.36" OD, 0.298" ID) for mag and stock/brace.
• AR Lower Parts: Springs and optional complete lower parts kit (approx. $40); steel rods can substitute for FCG pins.

Recommended Tools

• 3D printer with compatible settings for detailed parts.
• Allen keys for M3, M4, and M5 socket head cap screws.
• Heat insert tool for installing inserts into printed components.
• Basic hand tools for assembly and finishing of firearm parts.

Wisp Parts

The Wisp file package includes a comprehensive set of STL files for nearly all components of this AR-based .22LR bolt-action design, covering the receiver, stock, brace, handguard, and bolt assembly. Recommended print settings include a layer height of 0.2mm for precision and at least 50% infill for structural integrity, especially for high-stress parts like the bolt handle and stock risers. Materials such as PETG or ABS are suggested for their durability and heat resistance, crucial for firearm applications.

Special considerations include ensuring proper alignment during printing for parts like the barrel adapters and reinforcement plates to avoid fitment issues. Post-processing may involve light sanding or filing to ensure smooth operation of moving parts. Detailed build instructions are available in the provided PDF guide at this link.

Printer Compatibility & Settings

The Wisp design is compatible with most FDM 3D printers capable of handling detailed prints, such as Ender 3, Prusa i3, or similar models with a build volume of at least 220x220x250mm. Recommended materials include PETG or ABS for their strength and thermal resistance, critical for firearm components under stress. Print settings should prioritize a 0.2mm layer height, 50-70% infill, and a minimum of 4 wall layers to ensure durability.

Supports are necessary for complex geometries like the stock hinge and handguard mounts, and a brim or raft may help with bed adhesion for larger parts. Ensure proper cooling to prevent warping, especially with ABS, and calibrate your printer for tight tolerances to guarantee part compatibility.

Conclusion

The Wisp offers an unparalleled opportunity for 3D printing and firearms enthusiasts to build a highly customizable, AR-based .22LR bolt-action firearm with minimal reliance on commercial parts. With its iterative improvements and detailed build guide, this project combines innovation with practicality, delivering a rewarding experience for intermediate builders. Download the Wisp today, follow the provided instructions, and join a growing community of DIY firearm creators pushing the limits of personal fabrication.