In the recent Glock shootability thread, there was passing reference to the performance of a short vs a longer slide with a red dot. Previously the short Glock slide came at the cost of a 19 length frame, but now we have the 45 and 19X combining shorter slides with full size grips. I have done quite a bit of testing with different slide lengths, including as recently as a few hours ago, and continue to have my best performance with a dot on the longer Glock 34. Surf referenced some work he has done with the G45 MOS, and I am certain others have information to contribute, so I thought it would be an interesting topic.