I don't have one personally and have never timed one. I haven't even shot one myself. The couple that I saw fired from an UZI put out 1/10 the bullet by size and made up for it by going ten times as fast. At least it seemed that way. :rolleyes Honestly my best guess would be ~1,600 - 2,000 RPM. Karl.
I haven't timed one but have one and would guess about 850 rpm. I can get doubles but not sigle shots off in FA. Diffinitely slower than a mac 10. I think thoseare around 1200 rpm.
I don't have anyway of measuring the speed,but If 9mm is 600-650rpm,and 9mm with buffer is 800- 900, then .22 and 40 s&w are up there . .45 is faster than 9mm but not as fast as either the .22 or 40sw. imho
Bill Stover and I went shooting and he has a timer. My .22 kit was clocking right at 1200RPM. 9MM was between 675 and 750. This was at an indoor range and the timer was having a little trouble with the enclosed space. I think these ROF are pretty accurate however. YMMV!