After the war, new SMG designs appeared frequently. ... However, submachine guns are still used by military special forces and police SWAT teams for close quarters battle (CQB) because they are "a pistol-caliber weapon that's easy to control, and less likely to overpenetrate the target".

Who uses submachine gun?

Submachine guns rose to prominence as a front line close-quarters combat weapon and commando firearm during World War II. They are now widely used by police SWAT, military commando, paramilitary, and counter-terrorism team members for a variety of situations.

Do Navy Seals use Smgs?

Military special forces utilize the MP7 much like they have used submachine guns for decades. Smaller, lighter weapons that can provide automatic fire are invaluable for close-quarters combat and the 4.6x30mm's armor-piercing capability make the MP7 a natural choice for elite units needing compact firepower.