Is Glock ever gonna branch out?

[El Pablo]

True, and they have been used. I just feel like with advances in ammunition (like frangible or fragmenting 556 ammo) it degrades the point of pistol caliber sub guns. Ammo costs are also something to consider when comparing the two.

Take an MP5, with an OAL of 19ish inches. Its great, you can use it to great effect indoors, but once you need to be using it for something other than kicking doors, its greatly upstaged by the much cheaper, more accurate AR with a 7 inch barrel, which is only 5-8 inches longer. I feel that submachine guns are one trick ponies.

I just want a 10mm lever gun one of these days. I'll call it my cowboy smg.

You need to shoot all these suppressed. That makes me like the mp5 and clones, along with other pistol caliber sub guns.