Area 419 Defiance Bolt Knob Features The Area 419 Defiance Bolt Knob is built around a finger groove that the shooter s finger automatically catches assuring the fastest smoothest bolt manipulation without searching for the ideal grip position each time. Two knurled surfaces sit on either side of the groove giving a sure grip whether running the bolt fast in competition or carefully during precision shots. Made in the USA from 6061-T6 aluminum the knob is anodized flat Black for a durable finish that resists wear through repeated cycling. This combination of material and finish makes the knob tough enough for both competition use and everyday range sessions. Threaded 5/16 inch-24 the Defiance Bolt Knob is built to thread directly onto Defiance and compatible Remington pattern bolts without modification. Shooters running a Bergara action will need the M6x1 threaded version and Mausingfield or Nucleus bolt owners should look to the internally threaded 10-32 option instead so fitment should always be confirmed before ordering. Once installed the knob transforms bolt manipulation from a search for grip into a single confident motion. The Area 419 Defiance Bolt Knob is for sale at GrabAGun for precision rifle and competition shooters who want faster more reliable bolt handling. Area 419 Defiance Bolt Knob Specifications Manufacturer: Area 419 Model: Defiance Bolt Knob Color: Black Anodized Material: Aluminum Compatible Hosts: Defiance Thread Pattern: 5/16-24 Length: 1 Width: 1 Weight: 0.2 lbs Available At: GrabAGun