Looks like a quality piece.Raven Concealment Systems (RCS) Phantom. http://raven-concealment-systems.mybigcommerce.com/glock-custom-phantom-modular-holster/
If you buy a set of IWB soft loops, you'll get one holster that will allow you to carry either IWB or OWB just by changing out the attachments. You can also change the ride height and cant by moving those attachments around. It is a very useful holster for helping you figure out what mode of carry you prefer with just the one holster and a couple of attachments.
There are a couple dozen makers of similar designs, but RCS is probably the oldest and most well known.
Russellc