Sonju Industrial Inc. (SI Defense), has diversified its capabilities and infrastructure to produce AR-15 and AR-10 upper and lower receivers and components. Producing components for the Lockheed F-22 fighter plane, Raytheon Standard Missile-3 and Boeing 737, to name a few, the move to a quality commercially available product AR-15 and AR-10 was a seamless transition. “We are already producing high-quality parts for the military, so we structured ourselves to produce AR’s,” said President and owner Dick Sonju. “As a Vietnam veteran, I know what a quality rifle is and how important it is to have a reliable weapon” he also said.

Sonju Industrial is the only service-disabled veteran company that employs an ISO-9001 and AS9100 quality management system to produce AR-15 and AR-10 receivers.

Customers can order AR upper and lower receivers machined from 100 percent billet or forgings and available in different aluminum alloys such as 6061, 7050 or 7075. Custom logos and coating can be specified. Full sets are completed by hand for a seamless perfect match. The receivers and components are finished by anodizing to mil spec MIL-A-8625.

For more information on SI Defense’s AR receivers, visit

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