Using state of the art, precision CNC milling machines, Stubborn Mule Outdoor Supply, LLC. manufactures the finest lower receivers for 50 BMG and AR-15.
Each receiver is made from the highest grade blanks of billet aluminum and milled to exacting tollerances.
Because our lowers are milled, we have the capability to provide our customers with custom configurations at an afforadable cost.
Our Custom Machining can give your rifle special functionality to meed your specific needs or can be for cosmetic appeal by having your own engravings or insignias milled right into the receiver.