The Mono-Poly AR15 Lower Receiver

The Mono-Poly AR15 Lower Receiver Features

The Mono-Poly AR15 Lower Receiver stands out with its monolithic design, mimicking the strength and simplicity of injection-molded polymer receivers. By integrating multiple components into a single piece, it significantly cuts down on assembly complexity and overall firearm weight.

Here are some key highlights of this innovative design:

• Lightweight Construction: Reduces the heft of your AR-15 build, making it easier to handle.
• Cost-Effective Solution: Offers an affordable alternative to commercial monolithic receivers.
• Customizable Strength: Final durability depends on your choice of material, print settings, and whether you opt for the one-piece or two-piece model.

This design prioritizes practicality for 3D printing enthusiasts, delivering a balance of performance and accessibility. It's a fantastic choice for those eager to experiment with polymer AR-15 components in their home workshop.

Difficulty & Build Time

• Skill Level: Intermediate
• Estimated Build Time: 1-2 days (including printing and assembly)
• Required Experience: Basic knowledge of 3D printing and familiarity with AR-15 assembly recommended

Hardware and Tools Required

Required Hardware

• AR-15 lower receiver parts kit (trigger group, safety selector, etc.)
• Compatible buffer tube and stock (if using one-piece design)
• Fasteners and pins as per standard AR-15 assembly

Recommended Tools

• 3D printer with adequate build volume
• Screwdrivers and Allen keys for assembly
• Sandpaper or finishing tools for post-processing
• Drill (if modifications are needed for fitment)

The Mono-Poly AR15 Lower Receiver Parts

This downloadable file includes the STL models for the Mono-Poly AR15 Lower Receiver, available in both one-piece and two-piece configurations for flexibility in printing and assembly. The design is optimized for polymer materials, with the final strength heavily influenced by your material selection and print orientation. Detailed build instructions are provided in the accompanying PDF guide, accessible at Mono-Poly v1.2 Build Tutorial.

For best results, print with high infill settings (50-80%) to ensure structural integrity. Consider using a strong filament to mimic the durability of glass-filled nylon used in commercial models. Special attention should be paid to print orientation to maximize strength in critical stress areas.

Printer Compatibility & Settings

The Mono-Poly AR15 Lower Receiver is compatible with most FDM 3D printers that have a sufficient build volume to accommodate the monolithic design. Recommended materials include PETG or ABS for their balance of strength and flexibility, though advanced users may experiment with nylon-based filaments for enhanced durability. PLA is not advised due to its brittleness under stress.

Set your printer to a high infill percentage (50-80%) and use a layer height of 0.2mm or lower for better detail and strength. Ensure proper bed adhesion and consider using a brim or raft to prevent warping during long prints. A heated bed and enclosure are highly recommended for ABS to minimize cracking.

Conclusion

The Mono-Poly AR15 Lower Receiver is a game-changer for 3D printing and firearms enthusiasts, offering a lightweight, cost-effective way to build a monolithic AR-15 component at home. With detailed build instructions and customizable options, this design empowers you to create a unique firearm tailored to your preferences. Dive into the community at thegatalog.com to share your build, gain insights, and explore more innovative designs like this one.