AR Style Rifle extension Tube Castle Nut


Upgrade your AR rifle with our AR Style Rifle Extension Tube Castle Nut, designed for secure staking and reliable performance. Crafted from high-quality steel and hardened steel, this mil-spec replacement nut ensures durability and longevity. Its solid construction and corrosion-resistant black oxide coating make it ideal for both new builds and replacing worn parts. Made in the USA for superior quality assurance.

Availability: In stock SKU: DT3-023 Categories: , , Tags: , ,


AR Receiver Extension Tube Castle Nut

Looking for an AR-rifle tube castle nut that’s actually designed to be staked? Look no further than our AR Style Rifle Extension Tube Castle Nut! This nut features a notched and circular configuration that screws on to the lower receiver extension. And, designed to keep everything in place. The standard mil-spec AR castle nut will have notches cut out of it, resembling a castle tower.

The other side of the nut features smaller indentations that face the receiver and the end plate when the AR castle nut’s installed. These smaller notches, designed for the staking process. So, if you’re looking for a reliable, well designed castle nut, pick up our AR Style Rifle Extension Tube Castle Nut today! Mil-Spec Replacement AR-rifle tube Castle Nut made from high quality steel and hardened Steel.  Also, the castle nut is solid construction and coated with a corrosion resistant black oxide coating. Also, this castle nut is designed to be a replacement for worn parts or for a new custom AR15 build.


WARNING: This Product can expose you to chemicals which is known to the state of California to cause Cancer and Reproductive Harm. For more information, see

Additional information

Weight 3 lbs


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