Preview images shown are examples of professionally manufactured Semi-Auto STEN MK2/MK5 receiver builds produced to semi-automatic specifications using a properly machined semi-auto tube designed specifically to function with a semi-automatic bolt assembly.
This is not a mass-produced component or unfinished generic tube assembly. Each receiver build is individually fitted, aligned, welded, and carefully assembled by a licensed Type 07 FFL manufacturer with attention focused on proper geometry, fitment, reliability, and authentic appearance. Due to the amount of labor and precision required during the manufacturing and fitting process, production availability remains limited.
Every build is completed using professional tooling and proper fabrication methods to ensure a clean overall finish and reliable foundation for the final firearm assembly. The trunnion is professionally fitted and welded in place to maintain proper alignment and durability.
Unlike lower-quality rushed assemblies, these builds are intended for customers seeking a cleaner, more professionally manufactured STEN platform with proper craftsmanship and attention to detail throughout the fabrication process.
Optional services and customization may include:
• Ejector welding service (+$75)
• MK2 or MK5 configuration options
• Additional fitting/customization requests depending on project requirements
• Guidance regarding compatible semi-auto components and setup
Customers who may be unfamiliar with sourcing STEN components or parts kits will be assisted throughout the process. The builder can help identify the exact parts needed for completion and can point customers toward reputable sources for obtaining compatible components if requested. Communication is maintained throughout the process to ensure compatibility and customer satisfaction.
Current manufacturing turnaround time is generally a few weeks depending on production queue, customization requests, and parts availability. Customers will be updated regarding estimated completion timelines as the project progresses.
Each Semi-Auto STEN build is professionally inspected and tested for quality, fitment, and reliability standards before shipment or final completion.
The STEN platform continues to grow in collector and enthusiast demand due to its historical significance, iconic wartime design, and increasingly limited availability of quality semi-automatic reproductions and professionally fabricated receiver builds.
More photos and additional background information are available — search Sam’s Arms Repair on Instagram or Facebook
