The 10 mm would be interesting in a relatively small, assault rifle format, perhaps like the Thompson. It seems that the 10 mm is doomed to obscurity in the near future for a number of reasons, like the lackof a decnt pistol to shoot it from. The Colt Delta Elite is still avaliable on a sporadic basis and so is the Glock Model 20. Other than those two, I don't think anyone is making a factory 10 mm gun. The round has been replaced (at least in law enforcement) by the .40 for better or worse.
It's got the desirable features of a semi-auto, but with hair.
So, if it were up to me, I would adopt the 10mm Glock, by fiat, stamp 'em out like hotcakes and pump 'em to our troops right now.
Issue 10mm Grease-guns (O.K., MP-5s and nickel plated Uzis) just for esprit du corps (the "Thompsons just feel good...handy" factor, like swagger sticks, only louder), and make fluted, heavy barrel contour 6.8 uppers, with functional bayonet mounts.....but then again, I'd authorize the wearing of Mohican haircuts, war-paint, black leather motorcycle jackets, or Captain America costumes for elite units, with 10mm Scandium Thompsons, M14s, and BARs, and of course, mounted gets Rocket Belts, and laser weapons. Of course.
Hey, I gotta be me.
Squantos refuses.