MANUFACTURER: Ruger FAMILY: Silent-SR Series MODEL: Silent-SR TYPE: NFA - Silencer CALIBER/GAUGE: 22 LR FINISH: Cerakote (Black) OVERALL LENGTH: 5.375" THREAD PATTERN: 1/2x28 ATTACHMENT METHOD: Direct Thread DIAMETER: 1.06" CONSTRUCTION: Titanium, 17-4 SS & Aluminum DB REDUCTION: 40 dB SHIPPING WEIGHT: 1.15 lbs. ADDL INFO: 22LR Full Auto, 22WMR, 17HMR ADDL INFO: Titanium Tube/SS Muzzle Mount ADDL INFO: SS Baffles/Aluminum Rear Cap MFG MODEL NO: 19000