I would love if a manufacturer developed a modern gun in 7.62x25mm. I see a lot of comments on this thread discouraging it and saying it won’t catch on. I routinely see threads about the 7.62x25mm and people praising the cartridge and/or expressing interest in it. To rule out a modern firearm chambered in it simply because “the ammo is expensive”, it’s a “Com bloc cartridge”, “the magazines would have to be long”, etc is the result of personal preference and does not reflect the potential for a modern firearm’s success. Not everyone buys a gun based on how cheap the ammo is, how long a magazine is, and/or who developed and used the cartridge throughout history (our WWII foes, the Nazis, developed and used 9x19mm so using that logic, guns that are chambered in 9x19mm would be unsuccessful). My point is that people like/dislike guns for different reasons and to suggest that your perceived flaws with a cartridge is universally disqualifying is short-sighted. The appetite of a manufacturer to develop a gun takes into account a lot of factors. The purpose behind developing every firearm is not to create one with the largest magazine capacity, in the cheapest caliber, of the smallest size, etc; cost-to-profit ratio, uniqueness, demand signal, historical relevance, tooling, etc also play a role. That said, it seems like most manufacturers are content playing it safe and sticking with what is known to create large profits... polymer-framed 9x19mm handguns and ARs.