This is a BLACKHAWK Pouch known as the S.T.R.I.K.E., model 37CL60BK.
Mounts to any S.T.R.I.K.E.(R) or PALS/MOLLE platform by weaving the integral straps on the back of the pouch in and out of the platform webbing.
Features:
BLACKHAWK! Large Utility Pouch
Zipper closure
MOLLE Compatible
500 denier nylon