This is a Vertx Accessory known as the B.A.P., model F1 VTX5135 BK NA.
Experience the unique carry option of Vertx(R) Tactigami with the BAP. BAP stands for Belt Adapter Panel" which is their patent pending accessory piece developed specifically to work with standard holsters and MOLLE accessories for completely customized carry of gear. Built from Velcro(R) One-Wrap(R)" the BAP enables users to attach standard accessories to their belt" or use flat and attach to loop platform if desired.
Features:
Folds to 1.5 wide;Allows you to use your current holster carry holster with 1.5 belt loops
Capable of sliding through most belt loop accessories, such as holsters, mag pouches, baton holders, etc.