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AR Castle Nut Lock Nut
This castle nut is a critical component for anyone building or upgrading an AR platform. It is used to lock the buffer tube and receiver end plate securely in place, ensuring that the stock assembly remains stable and does not twist during active use or play.
Tips from the store: For a professional installation, we recommend using a dedicated "Castle Nut Wrench" or AR multi-tool. This ensures that you can tighten the nut sufficiently without damaging the grooves or finish of the barrel.
Solid construction and easy assembly
The locknut is made of durable material with a black anodized finish that matches most buffer tubes and receivers. With four deep grooves in the edge, the tool gets a good grip, which allows for the correct torque when tightening. This is an inexpensive but absolutely necessary insurance for your tactical setup to withstand the rigors of the field.
Compatible with buffer tube: 361828046/361815643
| Type | Castle nut/Lock nut |
| Suitable for | AR type buffer tube |
| Number of tracks | 4 slots for C clef |
| Finish | Black (anodized) |
Why buy parts at Game-On?
- Expertise: We have the parts you need for your project.
- Fast delivery: Shipped directly from our warehouse in Sandnes.
- Security: Full Norwegian right of complaint and support.
Customers purchase the products at their own risk and are responsible for complying with all local legal requirements regarding the purchase, possession, use, or transport of the goods available in the online store.
This includes, but is not limited to, ASG (
Restrictions on the purchase, possession, use, or transport of these items may apply in the destination country, and the seller assumes no responsibility for this. Any fees or costs (including administrative fees, validation, tax, and customs) are the customer's responsibility.
The use of ASG (