Design and launch a compact, durable polymer, spring-loaded bench loader that speeds up one-at-a-time round loading of double-stack Glock-pattern 9mm and .40 S&W magazines. The product must be easy to use, protect the user’s thumbs from wear, include an unloading/round-stripper feature, and deliver reliable performance for both standard and high-capacity mags at an affordable price point. Mechanical engineering developed in collaboration with Chris Greenwalt of Greenwalt Designs.