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While our core business is related to components and assemblies for small arms manufacture in general, we have the capability to produce a wide range of parts and assemblies per engineered specifications.

Stubborn Mule manufactures billet AR-15 upper and lower receivers, billet chassis, handguards, and accessories for several clients. We work with our customers jointly to produce precisely what they are looking for in a finished product. Providing quality OEM services, we make it our mission to be the best manufacturing partner any customer could have. Our size and flexibility enable us to deliver and tailor precisely to your needs.


If you are sourcing precision machined components and need a responsive, quality, domestic source, please contact us for a quotation. (Link Below)

The Shop

With the CNC machinery available today, we are capable of performing a wide range of tasks with excellent precision allowing for automated control, increased productivity, and quality parts.

Stubborn Mule Manufacturing has a over 20 years of experience in machining and manufacturing services in the USA. We have a vast variety of CNC machines, which offer high precision, amazing flexibility, and quality output for almost any project. We are also equipped with a team of experts, who are committed to providing you with the best-in-class service in the US. We assure you that no matter the size of the job, our professionals treat it as if it were their own.

Machining Capabilities

We can provide you CNC machining services with the following capabilities:

• Machining Processes: Drilling, Thread Milling, Tapping, Reaming, Parting/Cutting, Profiling, Facing, Threading, Pocketing, Countersinking, Broaching, Boring, Counter boring

• Tolerances: ± .001 in, ±.025 mm

• Materials: Steel, Alloy Steels, Aluminum, Stainless Steel, Brass, Bronze Alloys, Carbon Steel

• Machinery Axis: 3-Axis, 4-Axis, 5-Axis



We are known to extend our CNC machining services to a wide range of industries, which are as follows:


  • Energy

  • ATV

  • Marine

  • Motorsports

  • Machine Tool

  • Electronics

  • Military

If you are interested in knowing more about our CNC machining services, please contact our professionals at the earliest. You can get in touch with our experts via phone or email. Call us on (541) 955-6548, or email us your requirements and queries at

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