GrovTec US .800-.850in 2 Piece Barrel Band Swivel Set Black. Want to mount a sling on your lever action rifle's magazine tube? Our GT Barrel Band Swivel Sets are your answer. Our one and two-piece barrel band sets fit almost any firearm from a .22 rimfire magazine tube of .420in diameter up to shotgun barrel with a .900in diameter. Specifications for GrovTec US 2 Piece Barrel Band Swivel Set: Manufacturer: GrovTec US Color: Black Fabric/Material: Steel Gun Model: Universal Condition: New Package Contents: GrovTec US 2 Piece Barrel Band Swivel Set GrovTec US GTSW46: .800-.850in 2 Piece Barrel Band Swivel Set Black