Viking Tactics VTAC Low Profile Sling Mount Black. VTAC-LPSM is designed to make the Heavy Duty Quick Detach (HDQD) Swivel lock in and limit the rotation. The LPSM attaches to Picatinny rail. (HDQD sold separately.) Specifications for Viking Tactics VTAC Low Profile Sling Mount: Manufacturer: Viking Tactics Color: Black Condition: New Additional Features: Attaches to Picatinny Rail Country of Origin: USA Package Contents: Viking Tactics VTAC Low Profile Sling Mount Viking Tactics VTAC-LPSM: VTAC Low Profile Sling Mount Black