This is a BLACKHAWK Platform known as the Female Adapter, model 430952BK.
In 1990" a Navy SEAL was navigating a minefield when his pack failed. As his gear tumbled to the ground" he vowed that if he got out of there alive he would make gear the right way. Today" this commitment to quality and reliability applies to everything BlackHawk does.
Features:
Allows one holster to be used on multiple platforms and easy 360-degree adjustments
Holster releases by lifting the quick-disconnect tabs and turning counterclockwise