while I was at Kolar, we did produce about a dozen Parker shotgun proto-types for Remington. While that was wrapping up, Kolar was designing the 90-T. The proto-types were built before Remington was approached about marketing the gun. With Remington interested, a few changes were made (one being a safety button), and a dozen more were made and taken to the Grand for shooters to try.
A few bugs developed during that trial period, and were correct. A contract was signed, Kolar manufactured and Remington marketed.
About 1998 Kolar began designing their own gun.
tj303 above has it correct about the purchase of Kolar and moving it to Racine.
The tube business was the bread & butter of Kolar Arms for many years. As Kolar began hiring more skilled employees, the work they could perform expanded, such as back-boring, choke tubes, adj combs, Kolar Comps, Kolar-Coils, rebluing, stock refinishing etc.
Perazzi MX8 was correct about Kolar sharing a building with Don's other companies...Pioneer Products, Peterson Machine, and Letsch Manufacturing, but between 1988 and 1989, Kolar and Letsch Manufacturing moved to their own facility toward the west side of town.
Doug