Looking ahead, the development team has hinted at several future updates and projects that are in the works. These are expected to further enhance the capabilities of the FGC-9 hardware and continue to showcase the potential of open-source firmware development.
Firearms safety is paramount, and each revision of the FGC-9 probably includes enhancements to ensure the firearm operates safely under various conditions. This could involve improvements to the trigger mechanism, safety catch, or other critical components.
Fgc-9-mkii-rev5.zip ├── 📄 Documentation & Safety Guides (PDF) ├── 📄 Detailed Bill of Materials (BOM) ├── 📂 3D Print Files (.STL / .STEP) │ ├── Lower Receiver │ ├── Upper Receiver │ ├── Stock & Handguard │ └── Magazines (Glock-compatible) └── 📂 ECM Tooling & Metalwork Guides Fgc-9-mkii-rev5.zip
: Replaced the side-protruding reciprocating handle with a non-reciprocating MP5-style side charging handle Ejector System
The file Fgc-9-mkii-rev5.zip is a compressed archive containing the latest firmware update for the FGC-9 MKII, an upgraded version of the original FGC-9. This revision, denoted as Rev5, signifies the fifth major revision of the MKII branch, indicating continuous development and improvement efforts by the team behind the project. Looking ahead, the development team has hinted at
– A 26‑year‑old gunmaker in Illinois who helped design the ECM barrel‑making process, the Menendez magazines, and much of the additional content in the Rev5 package. He has described the gun’s use as “a tool of liberation” .
The exact changelog for Rev5 is not formally documented, but analysis of DEFCAD’s library confirms that is labeled as “Version: 2.5.0 latest Rev5 Release,” indicating it represents the final, most refined iteration of the MkII package. Community sources indicate that Rev5 incorporated minor bug fixes, improved print orientations, updated documentation, and small reliability tweaks compared to earlier Rev1–Rev4 releases. This could involve improvements to the trigger mechanism,
– A tutorial explaining how to manufacture 9mm ammunition in regions where ammunition is heavily regulated or difficult to obtain, using nail‑gun cartridges and decorative bullets.
: Includes a mount based on G36 dimensions specifically designed for 1-point tactical bungee slings.
: An MP5-style side charging handle that stays stationary while firing, replacing the older bolt-integrated handle.
Tweaks to the feeding mechanism to improve performance with various types of 9mm ammunition.