Carbon dummy suppressor CNC aluminium (6000 series) base and head (with Oring compression attachment), Carbon fiber body (1.5mm) thickness. -14mm CCW thread -Outer Diameter : 40mm -Inner Diameter : 37mm -Length : 390mm -Weight : 200 Grams -2 barrels spacers (NBR material, 37mm) -10 open cells acoustic foam insert rings (5 small, 5 large)* This suppressor muzzle attachment system by compression Oring allows the installation of barrel spacer to use this item as a barrel extension (SBA-BBS-09 and SBA-BBS-12). Due to the manufacturing process, all tubes present an overlap pattern, and may not be exempt of small visual defects. *Depending on the location of your retailer, this item may come without foam inserts due to local laws and regulations, please get in touch with the retailer prior purchase for confirmation. SBA-SIL-40