USED DFCO Kung Fu Grip Plug Black PLUG-KFG. DFCO storage PLUG accepts two CR123 AA or AAA batteries. It also has a slot for a single CR2032 battery a pocket for a small Allen or Torx wrench and a slot for a MultiTasker NANO Tool. Specifications for DFCO Kung Fu Grip Plug: Manufacturer: DFCO Color: Black Weight: 0.7 oz Fabric/Material: Rubber Features of DFCO Kung Fu Grip Plug Water drainage holes on the bottom Compatible w/ AR15 M4 M16 AR10 M110 SR25 MCX MPX 12 degrees grip angle Retro texture Package Contents: DFCO Kung Fu Grip Plug DFCO PLUG-KFG: Kung Fu Grip Plug Black