The ERECT9R by Q is the definition of modular. – It’s not only the quietest 9 mm silencer it’s also the lightest at only 8 oz in it’s longest configuration. On top of that it’s the loudest longest and shortest silencer on the market.. Wait. What? – Configure this silencer with one baffle or all ten to fit the needs of your host firearm and ammunition. The choice is yours…choose wisely. – Comes standard with booster system. Fixed mount available for PCC’s and SMG’s. – SKU SIL-E-9 / SIL-E-9-BLACK – CALIBER 9 mm – WEIGHT 8 oz (fully assembled) – DIAMETER 1.375 in – OVERALL LENGTH 8.7 in (fully assembled) – ATTACHMENT / MOUNT 1/2-28 Piston (others available) – MATERIAL(S)V Stainless Steel Aluminum – FINISH(S) Clear Hard-Coat Anodize & Heat Treat (shades of tan) / Black Hard Coat Anodize & Heat Treat