Which innovative product design strategy did the Winchester Repeating Arms Company use during WWI to increase adoption of their rifles among Allied forces?

Throughout history, military equipment manufacturers have employed unique product design strategies to make their products appealing to governments and armed forces. Some design choices were purely functional, while others had psychological or marketing purposes. This poll tests your knowledge about how military equipment was designed and marketed throughout different eras.

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They designed interchangeable parts with competitor rifles to create market dependency
They offered customized engraving services to military officers, creating aspirational desire among regular troops
They created demonstration teams that toured training camps to showcase the rifle's reliability in adverse conditions
They developed color-coded ammunition boxes to simplify logistics, a design innovation later adopted by all manufacturers