Arc Division Sparc M V2 Pistol Compensator 9mm Gen 4 .5x28 Anodized Black. The Sparc will help you shoot flatter and faster in all situations. We offer our comp threaded in the standard 1/228 threaded barrels. Specifications for Arc Division Sparc M V2 Pistol Compensator: Manufacturer: Arc Division Color: Black Fabric/Material: 7075 Aluminum Threads per Inch: 1/2x28 Gun Make: Glock Gun Model: Glock 17 Glock 19 Length: 1 in Weight: 0.8 oz Condition: New Projectile Caliber: .355 Caliber Fit: Glock Features of Arc Division Sparc M V2 Pistol Compensator Single top port compensator Square back Package Contents: Arc Division Sparc M V2 Pistol Compensator Threadlocker Allen Key Set Screws Instruction Sticker What firearm models does the manufacturer say Arc Division Sparc M V2 Pistol Compensator is compatible with? The manufacturer says that Arc Division Sparc M V2 Pistol Compensator is compatible with Glock 19 Glock 17Arc Division 23010: Sparc M V2 Pistol Compensator 9mm Gen 4 .5x28 Anodized Black