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AR Castle Nut Locknut
This castle nut is a critical component for anyone building or upgrading an AR platform. It is used to securely lock the buffer tube and receiver end plate in place, ensuring that the stock setup remains stable and does not twist during active use or gameplay.
Store tip: For a professional installation, we recommend using a dedicated "Castle Nut Wrench" or an AR multitool. This ensures that you can tighten the nut sufficiently without damaging the notches or the tube's finish.
Solid construction and easy installation
The locknut is made from durable material with a black anodized finish that matches most buffer tubes and receivers. With four deep notches around the edge, the tool gets a secure grip, allowing for the correct torque when tightening.This is an affordable but essential piece of insurance to ensure your tactical setup can withstand the rigors of the field.
Compatible with buffer tube: 361828046 / 361815643
| Type | Castle nut / Locking nut |
| Compatible with | AR-style buffer tube |
| Number of slots | 4 slots for C-wrench |
| Finish | Black (anodized) |
Why buy parts from Game-On?
- Expertise: We have the parts you need for your project.
- Fast delivery: Shipped directly from our warehouse in Sandnes.
- Peace of mind: Full Norwegian consumer complaint rights and support.
The customer purchases the goods at their own risk and is 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 (softguns), air rifles, and paintball replicas, which may be subject to specific regulations concerning weapons and ammunition.
Restrictions on the purchase, possession, use, or transport of these goods may apply in the destination country, and the seller assumes no responsibility for this. Any fees or costs (including administrative fees, validation, taxes, and customs duties) are the customer's responsibility.
The use of ASG (softguns), air rifles, and paintball replicas requires appropriate safety measures and caution. These products are not intended for persons under 18 years of age.