One Hundred Concepts SlingHook Black. The SlingHook is a simple solution to the common problem encountered when rucking with a rifle: The load lifters of the pack do not allow the rifle sling to distribute the weight across the wearer's back ultimately placing the burden on the wearer's neck causing fatigue and chaffing. If your rifle is uncomfortable to carry with a pack its easy to resort to carrying it haphazardly with a ruck. This is a simple tool that can make a difference in keeping your rifle comfortably at the ready. Specifications for One Hundred Concepts SlingHook: Manufacturer: One Hundred Concepts Color: Black Features of One Hundred Concepts SlingHook Durable Reduces Fatigue Package Contents: One Hundred Concepts SlingHook One Hundred Concepts OHC-SH: SlingHook Black