MANUFACTURER: SIG SAUER FAMILY: MODX Series MODEL: MODX-9 TYPE: NFA - Silencer CALIBER/GAUGE: 9mm OVERALL LENGTH: 3.25" - 7.75" ATTACHMENT METHOD: Direct Thread WEIGHT: 5 to 8oz SHIPPING WEIGHT: 1.55 lbs. ADDL INFO: Piston System Attachment ADDL INFO: 1/2X28 & M13.5X1LH Pistons MFG MODEL NO: MODX-9 UPC: 798681613137