First, the answer by BESW is absolutely correct - in the new Doctor Who, the sonic screwdriver is simply a magic wand. The Day of the Doctor explains the device as a molecular screwdriver, able to manipulate matter on the atomic scale, allowing all three Doctors to disintegrate their cell door - plus having the storage capacity to record each and every atom and the computational power able to compute a "dissolving" "frequency"-"thing" across hundreds of years. Unfortunately, from that context try explaining away the "pushback" beam.
Second, the sonic screwdriver has never been a ray gun. As I recall the only characters in the new Doctor Who to possess a sonic gun are Cpt. Jack Harkness and River Song. These devices behave very differently from sonic screwdrivers.
Third, in relation to specific features I bring you an excerpt from Forest of the Dead, Season 4 Episode 9:
00:07:10,989 --> 00:07:13,604
There's a signal coming from somewhere,
interfering with it.
00:07:14,015 --> 00:07:16,315
-Use the red settings.
-It doesn't have a red setting.
00:07:16,350 --> 00:07:19,740
-Well, use the dampers.
-It doesn't have dampers.
00:07:19,775 --> 00:07:21,060
It will do one day.
00:07:24,819 --> 00:07:27,508
So some time in the future, I just
give you my screwdriver.