This is a BLACKHAWK Platform known as the S.T.R.I.K.E., model 38CL63BK.
Designed to fit any BLACKHAWK(R) injection-molded concealment holster at any angle" the S.T.R.I.K.E.(R) Platform can be mounted to any S.T.R.I.K.E.(R) or PALS/MOLLE web system. Holds rail-mounted accessories such as mag cases" light cases" knife sheaths" etc.
Features:
Ambidextrous adapter platform
Constructed of injection-molded polymer carbon-fiber blend