Just ordered a new upper for my Ruger mark 3 pistol through a distributor in Australia. Got myself a 6" Blue threaded Barrel with silver flutes sorta like this but blue and with out the rail.

Currently am running a slab barrel version with a weaver handgun scope on it and while accurate I find it a tad bulky.
So am thinking get this lighter version and run a small red dot instead.
Question ha any one got one of their barrels and what they think of them, any pitfalls or things I should be aware of that you know of?