Proof Research Sendero Pre-Fit Barrel Features The Proof Research Sendero Pre-Fit Barrel is built in carbon fiber around a Sendero contour chambered for .22 Creedmoor with a 1:8 twist rate across five grooves. Pre-fit machining means the barrel is cut to mate directly with a Defiance Ruckus action taking much of the guesswork out of a barrel swap or custom build. Carbon fiber construction keeps weight forward of the action low while preserving the rigidity needed for consistent repeatable accuracy. This combination makes it a practical option for shooters chasing flat-shooting high-velocity performance from a lightweight precision platform. The 18 barrel length keeps the overall package compact and maneuverable without sacrificing the velocity a .22 Creedmoor load needs to perform at distance. A 5/8-24 threaded muzzle accepts a wide range of muzzle brakes and suppressors giving the shooter flexibility to tune recoil and sound signature to the application. Because the barrel ships pre-fit installation time and cost are reduced compared to a blank requiring full chambering and fitting work. Carbon fiber barrels also dissipate heat differently than steel helping maintain point of impact across strings of fire in the field. Built for custom rifle builders and gunsmiths the Sendero Pre-Fit Barrel is a straightforward way to bring PROOF barrel technology to an existing action. The five-groove rifling and 1:8 twist are matched to stabilize the heavier bullets a .22 Creedmoor shooter is likely to run rounding out a barrel built specifically for long-range precision work. Proof Research Sendero Pre-Fit Barrel Specifications Manufacturer: Proof Research Model: Sendero Pre-Fit Barrel Caliber: .22 Creedmoor Barrel Length: 18 Action: Bolt Barrel Material: Carbon Fiber Type: Pre-Fit Twist Rate: 1:8 Grooves: 5 Thread Pattern: 5/8x24 Compatible Hosts: Defiance Ruckus Available At: GrabAGun