Engineering quality without compromise Check-Mate operates under a dual yet simple mantra: nothing worth doing is easy, and if you're going to do something, do your absolute best. At Check-Mate, there are no small details, so every professional challenge is met with enthusiasm and the dedication to exacting standards.This philosophy permeates every aspect of our business, from producing industry-leading magazines for the worlds finest firearms manufactures, to manufacturing precision stamped and machined components. Check-Mate, the only choice. (less)