DETAILS The SRD9 9mm pistol silencer features a Grade 9 titanium tube and 17-4PH stainless steel baffles allowing for light weight and durability. The SRD9 features a booster for use with Browning Tilting Barrel type pistols. A fixed barrel spacer is also available for use with fixed-barrel hosts like the SIG MPX. The SRD9 ships with both 1/2"x 28tpi and M13.5x1mm LH pistons. ADDITIONAL INFORMATION SKU- SRD9Caliber- 9mmManufacturer- Sig SauerOverall Length- 7.2 in (183 mm)Overall Width- 1.38” DiameterFrame Material- Titanium / Stainless SteelAccessory Rail- Not ApplicableAdditional Info- 1/2 in - 28 tpi & M13.5 x 1 mm LH THIS IS A CLASS 3 NFA ITEM. ALL NFA RULES APPLY