Thanks for all the info!  I guess I'll go with a longer barrel for now and wait on the slide.  Any suggestions on barrels?  I've seen Lone Wolf, KKM, and Storm Lake websites, but I would like to know your experience with and recommendations.

I'm new to the forum, so forgive me if this has been addressed somewhere...  I've just picked up my first Glock 20, a Gen 4...actually my first Glock as well (found some cool Ted Nugent 10mm ammo to go with it btw). 

Anyway, I am investigating a long slide option, but not sure if it's available for the Gen 4?  I've seen the barrels available from various manufacturers, but not the slides.  Any advice/direction is appreciated!  Looking forward to learning!