OSS Suppressors HX-QD 762 Suppressor 300 Winchester Magnum Black With 5/8-24 762 Muzzle Brake 2140HThis is an FFL item & requires shipment to an FFL. After order is placed, have your FFL email us a copy of their FFL referencing your order number.The HX-QD 762 utilizes a patented Flow-Through design that moves the gases through the unit in a helical pattern which allows for expansion and cooling as they exit out the front. The torque generated by the exiting gases keeps the suppressor snug on the mount. No tools are needed for installation or removal. The HX-QD 762's Flow-Through system does not increase back pressure (blowback) like a traditional baffle suppressor. This innovative technology produces heat at a lower rate than a traditional suppressor and it does not increase toxic gas discharge at the ejection port. The HX-QD 762 does not increase bolt velocity (+/- 5%). Therefore muzzle rise and recoil are managed and there is no increase in weapon malfunctions.