This is my favorite holster of all time - Safariland 6354DO ALS Optic Tactical Holster Only For Red Dot Optic

I was first introduced to this holster at work and it has been a must have for all of my personal and work guns. First my Glock 19 Gen 4 with a Surefure X-300 and a Sreamlight TLR-9. If you are putting a RDO on your pistol, be advised that you may need to modify this holster in order for the locking mechanism to activate. I recently put a Vortex Defender XL on my G19 and had to trim material away with a rotary tool to allow my gun to fully insert into the holster. All in all this is a 20/10 holster. Never using anything else.