The tactical solutions x-ring replacement barrel is machined from 6061-t6 aluminum and is designed to fit the ruger 10/22 chambered for.22 lr.It has an o.D.Of.920" and a 1:16" twist.This replacement barrel is significantly lighter at 15 oz and only 16.5" long and more accurate than factory barrels.The x-ring barrel fits all ruger 10/22 receivers and most aftermarket 10/22 style receivers.Accuracy is enhanced by a rifled chromoly steel liner with a polished 11 degree crown.Optional 1/2"x28 threads allow easy addition of a tacsol suppressor or compensator.X-ring barrels are also compatible with the ruger sr-22 rifle.Caliber Or Gauge: 22 Long Rifle (LR)Length: 16.50"Model: X-RingTwist: 1:16"Sights: NoneBore Type: RifledFinish: OD GreenType: RifleBarrel Type: ThreadedAmmo Type: TacticalBarrel Features: Fluted