Features:This is a redesign of the cleaning tube unit designed to provide you with the performance of a brake and the comfort of cleaning, and gives you the option to train or hunt with the most versatile system on the market. The free modular design, equipped with muzzle brake and sealed cap, gives you multiple uses. 2", 3.9", 5.1" three different sizes of cleaning tube can be freely combined to adapt to multiple scenarios of use.Specifications:Total length (training configuration): 8" (3.9" + 5.1") or 9.2" (2" + 3.9" + 5.1") Total weight (training configuration): 8" (455g/16oz) or 9.2" (554g/19.5oz) Overall length (competition configuration): 5.5" (2" + 3.9") or 6.6" (2" + 5.1") Total weight (race configuration): 5.5" (318g/11.2oz) or 6.6" (372g/13.1oz) Length (brake): 2.37", Hole Diameter: 10.7mm (0.42") Diameter: 1.72" Material: stainless steel (except caps, adapter, connector) Caps, adapter, connector material: aircraft grade aluminum 7075 Surface treatment: triple anodized Construction: Weldless, compression taper fitPackage includes:1x 2" Tube 1x 3.9" Tube 1x 5.1" Tube 1x muzzle brake 1x Tube end nut 1x Sealed cap 1x Connector for tube to adapter 1x 1/2x28 adapter 1x 5/8x24 adapter