Leber V1 (ARMP5 V2) Open Beta V2

Leber V1 (ARMP5 V2) Open Beta V2 Features

The Leber V1 stands out with its AR15 FCG compatibility, allowing users to leverage familiar components for a seamless build. This remix introduces significant updates to the AP5 lower, addressing previous design flaws for improved reliability.

• Enhanced Compatibility: Supports a wide range of MP5 variants, including SP5, AP5, POF, ZF5, and early import HK models.
• Innovative Design: Utilizes Hoffman bushings and grip inserts, mirroring the robust construction of Hoffman Tactical’s super AR15 lowers.
• Customizable Fit: Designed for use with specific AR15 grips like the MOE+ (not standard MOE), ensuring a precise and comfortable fit.

This version, while more complex to assemble than the original ARMP5 V2, offers a rewarding challenge for dedicated builders. The included step files and detailed documentation make the process accessible despite its intricacies.

Difficulty & Build Time

• Skill Level: Intermediate to Advanced
• Estimated Build Time: 1-2 days (depending on experience and tools)
• Required Experience: Familiarity with 3D printing, firearm assembly, and basic machining (e.g., cutting coupling nuts with a Dremel or file)

Hardware and Tools Required

Required Hardware

• H&K 9mm Ejector Lever (3rd Gen)
• M3x6 Screws for Ejector
• M3x8mm Round Coupling Nuts (cut to ~6.8mm, link provided in description)
• 4x Hoffman Bushings
• 1/4-20 Brass Insert (available on Amazon or Hoffman)
• 1/4-20 x 1.125″ Screw
• Standard AR15 FCG Components (Hammer, Trigger, Disconnector, Selector, Springs, Pins)
• AR15 Grip (MOE+ recommended, not standard MOE)

Recommended Tools

• 3D Printer (FDM recommended)
• Dremel or File (for cutting coupling nuts)
• Screwdrivers and Allen Keys (for assembly)
• Calipers (for precise measurements)
• Drill (if additional fitting is needed)

Leber V1 (ARMP5 V2) Open Beta V2 Parts

This downloadable file includes the Leber V1 MP5 Lower STL files, tailored for various MP5 versions, including K lowers. The package also contains step files for easier customization and a comprehensive PDF guide for assembly instructions. For optimal results, print with high infill (80-100%) to ensure structural integrity, especially for high-stress areas.

It’s recommended to use durable materials like PETG or ABS due to the mechanical demands of firearm components. Pay attention to layer adhesion and avoid weak spots by printing at a slower speed if necessary. Always refer to the included ARMP5 V2 Documentation PDF for a detailed breakdown of printed parts specific to your MP5 variant.

Printer Compatibility & Settings

The Leber V1 (ARMP5 V2) Open Beta V2 is compatible with most FDM 3D printers capable of handling detailed and durable prints. Recommended materials include PETG or ABS for their strength and heat resistance, critical for firearm lowers. PLA is not advised due to its brittleness under stress.

Suggested print settings include a layer height of 0.2mm, infill of 80-100%, and a nozzle temperature suited to your material (around 230-250°C for PETG, 240-260°C for ABS). Ensure proper bed adhesion and consider using a brim or raft for larger parts to prevent warping. A well-calibrated printer with a build volume of at least 200x200x200mm is ideal for accommodating the lower’s dimensions.

Conclusion

The Leber V1 (ARMP5 V2) Open Beta V2 is a must-have for 3D printing and firearms enthusiasts looking to push the boundaries of custom MP5 builds. With its robust design updates, wide compatibility, and detailed documentation, this file offers both a challenge and a rewarding outcome. Download now, follow the provided guides, and join the community in testing and refining this innovative open beta design!