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Catalyst Arms - Hammerhead Bolt Knob

(60 reviews) Write a Review

$39.99

SKU:: HH-BK
Brand: Catalyst Arms
Product ID:: 43623

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Description

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

Excellent quality it's like a glove
5
Posted by Stephan on Feb 2nd 2026

Excellent product it's exactly as it should on my new rifle great craftsmanship
Bolt knob
5
Posted by Mike Fehervari on Oct 6th 2025

Knob worked out perfectly.
Painted is the same red as the rifle.
Great upgrade
5
Posted by Unknown on Jul 13th 2025

I see others have had an issue with threads but no problem with mine. It's a great size for using a proper grip or just your fore finger and the sniper Grey works great for the anesthetic.
Bad threads
4
Posted by Tom on Jun 24th 2025

Would not thread on all the way had to run a tap on it otherwise good product works great