I OC and CC my Glock 36 in a black Serpa CQC, with matching black mag carrier, worn at 3:00 and 8:00 respectively.
With the Serpa mag carriers, "Nevada Carrier's" observations also apply--you'll need one of Blackhawk's "Double Stack Mag Carriers", because the single-stack carriers aren't wide enough for the thick plastic Glock single-stack mags that the "36" uses. Also, the stock G-36 mag is VERY short, and the butt plate will ride almost flush with the top o the carrier, and it makes it a little tricky to draw quickly. However, if you use a Pearce extended (+1) buttplate, it gives you a little more substantial handle on the shot mags the G-36 uses. Plus it looks REALLY cool...
For deep CC, I use a Galco IWB "Stow-n-Go" worn at 4:00.
Both fit perfectly, ride comfortably, and draw easily and smoothly. Both are secure. Both look good, and have held up well, after about 6 months of near-constant use. Neither have produced ANY noticeable wear on the Glock's finish or frame, with near daily carry for 6 months.
I can't recommend the Serpa CQC highly enough. It draws like lightning, is secure and stable, and is VERY comfy for OC or winter (under a big coat or bulky sweater) CC.