If you dig using shoulder holsters for your GBB pistols, you can check the Craft Holster Shoulder Holster System in this overview done by Airsoft & Milsim News Blog (AMNB)... "Our friends at Craft Holsters are well known in the industry for their quality holsters, doesn’t matter if it’s Kydex, Nylon or Leather. I run several of theirs for a couple of years now since our ways crossed and yes, I’m satisfied when it comes down to quality, workmanship and usability.