Crusader M4 GBB Rotatable Tactical Sling Swivels-BK
Crusader Steel Outer Barrel for Umarex / VFC UMP GBB
Crusader Lower Receiver End Sling Mount for Umarex / VFC HK417 AEG & GBB
Lonex AEG/이노카츠/WA/LCT/VFC GBB용 강철 Sling Swivel-3Hole