svg-arrow-prev svg-arrow-next
Hover over image to zoom

Catalyst Arms - Hammerhead Bolt Knob

(51 reviews) Write a Review
Product ID:


The Catalyst Arms Hammerhead Bolt Knob

Upgrade your rifle with the Catalyst Arms Hammerhead Bolt Knob. This oversized aluminum bolt knob allows for better control on each shot. 

Its shape allows easy access and prevents the shooter’s hand from slipping onto the bolt handle. This bolt knob will fit all 5/16-24 bolt handles, allowing it to work for most rifles, including RPR and Christensen Arms. 

This bolt knob comes in black, red and sniper grey. If the Hammerhead isn’t the right fit for you, check out Anarchy Outdoors’ bolt knob collection. We have something for everyone. 

Features & Benefits

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

Customer Reviews

  • Great product

    Posted by Unknown on Mar 19th 2024

    Helps keep your hand in the correct position without sliding on handle

  • Catalyst Arms-Hammerhead Bolt Knob

    Posted by OleRascal on Feb 21st 2024

    I really like the heft on this Bolt Knob. It makes throwing the bolt back just that more easy. The size is just right. When you first get your RPR, it looks and feels great, but when you add the upgraded parts from Anarchy Outdoors, now you know that it's all yours!

  • Great Upgrade

    Posted by Spencer B on Nov 7th 2023

    I bought this looking to upgrade to my Ruger America. So I bought a new bolt handle and this knob. When I tell you it is a great upgrade and it feels very goood. Easy to grip, and has enough texture to make sure it won't slip. It looks anodized and it might be, but the "Red Color" did not match the Red on my other firearms that have "Red Anodized" parts. I understand the color can be off from one part to another, but this stands out. If you are trying to get it to match items you already have, you may noticed it seem a little brighter than my other part.
    Other than that, I am very happy with it. And would advise it for others.

  • Quality bolt knob

    Posted by Kurt on Sep 13th 2023

    Nice big bolt, balanced out the bolt well when coupled with the shroud upgrade. My RPR runs smooth as butter. Quality part with perfect positioning of knurled end not rough at all but a great grip. Anarchy delivers again

Write a Review

Questions & Answers

Shipping & Returns

Related Products