Volquartsen Firearms 32-Hole Comp 10/22 Bull Barrel Stainless .92in. It features 8 rows of 4 equally spaced holes that will not only minimize recoil but also disperse gases evenly for improved accuracy. Specifications for Volquartsen Firearms 32-Hole Compensator: Manufacturer: Volquartsen Firearms Threads per Inch: 1/2x28 Gun Make: Ruger Gun Model: Ruger 10/22 Condition: New Size: 0.92 in Country of Origin: USA Fabric/Material: 416R Stainless Steel Outer Diameter: 0.925 Weight: 3 oz Package Contents: Volquartsen Firearms 32-Hole Compensator What firearm models does the manufacturer say Volquartsen Firearms 32-Hole Compensator is compatible with? The manufacturer says that Volquartsen Firearms 32-Hole Compensator is compatible with Ruger 10/22Volquartsen Firearms VC1032-S-920: 32-Hole Comp 10/22 Bull Barrel Stainless .92in