The perfect SMG already exists. Its called the MP5/10
>load down the powder
>on the class of firearm that is known for using extra hot ammo with special tough primers in most military's that issued them
>with an action originally designed to handle .308
I don't think you understand the power of krupp steel
Well its got the (((proprietary))) claw mount system and H&Gay are making the latest ones with rail welded to them from the factory. The 10 also has things the 5 desperately needed, but never had because its a 60 year old design like a bolt catch on empty and a release for said catch. Strangely enough the new 5s don't have those features because kraut autism stating its perfect the way it is despite simple but big quality of life improvements being so close you can taste them like the Borchardt.