Area 419 Finger Groove Bolt Knob Features The Area 419 Finger Groove Bolt Knob is defined by its signature finger groove letting the shooter manipulate the bolt with just the pointer finger instead of hunting for the right contact point on every shot. That consistency matters most in competition where every tenth of a second on the clock and every bit of trigger time is on the line. The knurled surfaces on either side of the groove add a sure grip whether the hands are dry sweaty or gloved. Threaded M6x1 the knob fits Bergara and CZ 457 actions directly and also works on many Accuracy International rifles sharing the same thread specification. Machined from 6061-T6 aluminum the knob is anodized flat black for a durable non-reflective finish that matches most competition builds. Area 419 manufactures the knob entirely in the USA holding tight tolerances so the fit on the bolt body is solid and free of play. Shooters replacing a factory knob gain not just the ergonomic finger groove but a more substantial confidence-inspiring mass to run the action faster. For precision rifle and F-Class competitors alike this is a small upgrade with a real impact on bolt speed and consistency. Area 419 Finger Groove Bolt Knob Specifications Manufacturer: Area 419 Model: Finger Groove Bolt Knob Compatible Hosts: Bergara CZ 457 many Accuracy International rifles Color: Black Anodized Material: Aluminum Thread: M6x1 Length: 1 Width: 1 Weight: 0.2 lbs Available At: GrabAGun