[AGM Sten MK2] Modernization Kit (3D Printable), airsoft, sten, sten mk2, agm sten, conversion kit, tactical

"Transform your WWII relic into a space-age tactical weapon with ultimate modularity!"

This is a professional Tactical Modernization Conversion Kit designed specifically for the AGM Sten MK2 Airsoft gun. It completely overhauls the classic, bare-bones look into an aggressive, highly functional tactical rifle featuring a 4-sided full M-LOK system and Mil-Spec accessory compatibility.

💡 Key Features

• 4-Sided Full M-LOK Tactical Handguard: Features M-LOK slots on the Top, Bottom, Left, and Right sides, allowing you to mount any standard M-LOK accessories (grips, lights, lasers) or Picatinny rail sections.
• Mil-Spec AR-15 Buffer Tube & Pistol Grip Integration: The integrated rear housing allows you to attach standard Mil-Spec AR-15 buffer tubes, retractable stocks, and standard AR pistol grips for modern ergonomics and a comfortable hold.

🔩 Required Hardware (Not Included)

To assemble this kit, you will need the following fasteners:
• M3 x 8mm Countersunk Hex Bolts & Nuts: 4 sets (For Handguard & Mounting_Plate_1)
• M4 x 12mm Countersunk Hex Bolts & Nuts: 2 sets (For Mounting_Plate_2)
• TACSHIM Hex (Allen) Head AR Grip Screw (1/4”-28x7/8): 1 piece (For Pistol Grip installation)
• Original AGM Sten Stock Screw: 1 piece (Reused from your gun)

📦 What's Included (4 STL Files)

1. Handguard.stl (Front modular handguard with 4-sided M-LOK slots)
2. Mounting_Plate_1.stl (Internal fixing plate for the handguard - requires 2 prints)
3. Mounting_Plate_2.stl (Bottom clamp/retaining plate for the receiver)
4. Stock_and_Pistol_Grip_Housing.stl (Integrated lower receiver housing for Mil-Spec AR grips and buffer tubes)

⚙️ Assembly Instructions

[1] Handguard Installation:
1. Remove the original steel handguard/heat shield from your AGM Sten.
2. Slide the new 3D-printed "Handguard" onto the barrel/receiver.
3. Align and secure the two "Mounting_Plate_1" parts inside the handguard using the 4 sets of M3 x 8mm countersunk bolts and nuts.
4. Mount the entire assembly back onto the gun, then secure "Mounting_Plate_2" from the bottom of the receiver using the 2 sets of M4 x 12mm countersunk bolts and nuts to clamp it firmly into place.

[2] Stock & Pistol Grip Housing Installation:
1. Remove the original steel stock attachment plate from the rear of the receiver.
2. Slide the "Stock_and_Pistol_Grip_Housing" directly into the rear slot where the original stock was.
3. Secure it firmly by tightening the original AGM stock screw back into its place.
4. Install your favorite Mil-Spec AR-15 pistol grip onto the housing using the TACSHIM Hex (Allen) Head AR Grip Screw (1/4”-28x7/8), and then attach your buffer tube.

🔧 Tolerance & Fitment Support
3D printer tolerances and material shrinkage can vary depending on your setup. If you find that the bolts, nuts, or hardware holes do not fit perfectly on your print, please feel free to message me with your exact measurements. I will happily provide simple file modifications to ensure everything fits perfectly for you!

⚠️ IMPORTANT NOTICE: Strictly For Private Use Only
This 3MF project file and the contained 3D models are protected under copyright law and are licensed for PERSONAL, NON-COMMERCIAL USE ONLY.

PROHIBITED: You are NOT allowed to sell, resell, redistribute, or share the digital files (STL, 3MF) under any circumstances.

PROHIBITED: You are NOT allowed to sell physical 3D-printed copies of this kit, or components of it, for commercial profit or commercial purposes.

Legal action may be taken in the event of unauthorized commercial reproduction or distribution. Thank you for respecting the designer's hard work!

🛠️ Printing Tips

• Recommended Material: Bambu Lab PETG is highly recommended for optimal strength, excellent layer adhesion, and durability during airsoft gameplay.
• Walls & Infill: Set to 6 Outer Walls (Perimeters) and 40% – 50% Infill. This structural setup is highly recommended for maximum durability, especially for high-stress parts like the Stock_and_Pistol_Grip_Housing.
• Supports: Required depending on your specific printer setup and part orientation.