Blackhawk CQC Carbon-Fiber Holster with Serpa Technology Active Retention System. This unique holster design allows you to forget old-fashioned thumb breaks that slow your draw and complicate re-holstering. The patented SERPA Technology lock engages the trigger guard as you holster the pistol and won't let go until you release it. The release is made using your normal drawing mothion, with the trigger finger beside the holster body. Glock 17/22 /31. 75% Made in USA