Who Are We? Founded in Y2K, Stubborn Mule is a production machine shop located in the incredible Pacific Northwest. We manufacture a wide range of precision components for clients throughout the aerospace and defense industries, priding ourselves on unsurpassed efficiency, quality, and customer service. We possess a broad range of modern-day CNC equipment, old-school know-how, and the ability to deliver complex “parts on time” for a demanding customer base. From “delivery of first” article to long-term production, we understand the importance of intelligent engineering and overall cost reduction. Stubborn Mule is a Type 7 FFL/SOT, with extensive experience with ATF compliance. We manufacture private label components under variance for OEM customers throughout the firearms industry. Contact Us OEM INQUIRIES