>>64364333
Not only are the "chunky blowback machine pistols" far more stable in shooting than a stocked handgun, they can also fire literally hundreds of thousands of rounds without major parts failure.

That's why despite it's cost and theoretically slightly higher recoil than a roller-delayed SMG, and more bulk than a stocked handgun, militaries are still adopting blowback SMGs, because they won't need to buy new ones for a really long time.