Title:

MCX Upper Function and Proofing Fixture for Sig Sauer

Sig Sauer rifles must be held to the highest standard in quality especially since they are sold to armies and police forces across the world. One of Sig Sauer’s top selling line of rifles is their MCX series, a short stroke gas operated AR style rifle chambered for 5.56 NATO rounds. This is the trusted rifle of police and armed forces in countries like Australia, Canada, Belgium, Germany, The United Kingdom, the United States and many others. Before a Sig rifle leaves the facility, it must be put through extensive testing to ensure the quality of the rifle meets and exceeds expectations. These tests include line checks, function tests, rate of fire proofing tests, accuracy tests and final inspection. Once a rifle has been cleared of these tests will it be allowed to be packaged and shipped. When completing contracts or selling to consumers it is sometimes necessary for Sig Sauer to manufacture the MCX upper as a separate unit. Over the past few years this has posed a problem for the manufacturing team at Sig. Without an MCX lower there is no way to function and proof an MCX upper. My design is a system that can be used to function and proof an MCX upper without the need for a lower. An operator will be able to place an upper securely in the fixture and from a safe vantage point be able to operate the fixture to cycle rounds through the MCX upper. This completes the function testing, ensuring the bolt and piston in the upper function correctly and will also complete rate of fire testing for fully automatic rifles. With this fixture as a part of the quality line for the MCX rifle, Sig Sauer can continue to manufacture rifles with world class quality.

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