The barking spider is designed to redirect the noise, blast, and concussion forward away from the shooter (down range).It was specifically designed to handle full auto and high volume fire.The barking spider features a cutting edge blast cone design which is supported in both the front and rear.It is cnc machined from billet 4140 chromoly bar stock with a heat treated, durable black nitride qpq finish.It includes a thread protector and a 5 prong helix flash suppressor cap.Finish: Black NitrideType: Muzzle BrakeModel: Barking Spider2Dimensions: 3.75" LSize: 30 CalMaterial: 4140 Chromoly SteelThread Pattern: 5/8"-24 tpi