About

How can we help you today?

Quality since 1979

Larson Systems Inc. is an engineering-driven company that started in a Minnesota garage in 1979 and incorporated in 1981. In the ensuing 45 years, our campus has undergone remarkable expansion, now spanning over 34,000 square feet and employing a team of over 50 individuals. 

LSI has designed, manufactured, and distributed top-of-the-line manual and automatic force / length, torsion and torque measuring systems around the world. With two patents (U.S. Patent Numbers 6,094,980 & 6,289,744) on the Torsion Spring Tester (TST) line and many other ground-breaking designs on other products, LSI has clearly established the standard for others to follow!

After becoming a world leader in precision manufactured spring testing and gaging equipment, Larson Systems Inc. turned to another venture. Using the same attention to quality, durability, affordability, and detail invested into our industrial testing equipment, Larson Systems Inc. dba Stone Mountain Pet Products, began producing commercial grade, attractive, and easy-to-use pet products! 

The president of LSI, David Larson, is highly involved in the design process of all our products across both product lines, spring testing equipment and pet products. We continue to improve and update our product lines to help our customers overcome any quality testing and manufacturing challenges, as well as pet housing and dog daycare needs. 

Outside of the office, Mr. Larson has long been a member of the local gun club. He participates with several of the Larson Systems Inc employees in weekly leagues. Over the years, he’s been associated with many industry professionals and has learned quite a bit about firearms, their use and manufacture. Using his unique perspective and this knowledge he recognized a need he could fill and got his Type 07 Federal Firearms License. Focusing on a new industry niche, he began using the company’s decades of manufacturing and machining experience to fill a need producing top-quality firearm parts. 

Now with 3 Main Divisions: Spring Testers, Firearms & Components, Stone Mountain Pet Products, Larson Systems Inc. looks forward to product scope expansion to help our customers meet their needs.  

Need to visit our facility? Click here for directions.