bolt knob upgrades
Catalyst Arms - Hammerhead Bolt Knob
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Catalyst Arms - Hammerhead Bolt Knob

(9 reviews) Write a Review
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It's always hammer down with our Hammerhead bolt knob. Large, oversized and crafted from solid aluminum the Hammerhead is designed to provide a secure grip on the bolt handle in any and all conditions. Customized with a contoured "waist" for the ergonomic ability to push the bolt knob up with the trigger finger.


Features & Benefits

  • Fits bolt handles with 5/16-24 TPI 
  • Easy installation
  • Made in the USA
  • Weight: 1.5 oz
  • Dimensions: 1"x1"x2"


Available Colors:

Black, Red


See Also Big and Little Bertha Bolt Knobs!

9 Reviews

  • Catalyst Arms - Hammerhead Bolt Knob

    Posted by Lionel E. Hamilton on Nov 5th 2020

    Great up grade to my Ruger Precision Rifle over the manufactures knob. Makes second shots very quick, and you don't hit your knuckle on the scope nut. I coyote hunt and usually don't miss, but with this up grade I can get a second shot off very quick. I recommend this up grade to anybody who shoots a Ruger Precision Rifle.

  • Hammerhead Bolt Knob

    Posted by Tony Boyd on Jun 18th 2020

    This product great between your finger. It integrates your hand to your gun. I'm very impressed.

  • I love it

    Posted by Jack Nix on Nov 1st 2019

    I love it. Just installed it on my 338 RPR because of its size, it may not fit everything. I couldn’t use it on another rifle due to scope clearance issues, but that is no fault of the product.

  • Black Bolt Knob

    Posted by Eric on May 22nd 2019

    Well built and threaded cleanly. Not useful for a CZ 455. The lack taper makes it hit the ocular bell.

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Shipping & Returns

Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

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Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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