Armaspec Self-Retention “No Stake” Castle Nut

Be the first to review

Out of Stock
Orders will Ship within 1 Business Day
Backed by the Armaspec Lifetime Warranty!
TOP ADD-ON'S
Magpul UBR | 2.0 Carbine Stock w/ Buffer Tube – AR15/M4 – MAG482

Magpul UBR | 2.0 Carbine Stock w/ Buffer Tube – AR-15/M4 – MAG482

Starting at:
$189.95

AT3™ Mil Spec AR-15 Buffer Tube - 9 Colors Available - Black

$15.29

Armaspec Self-Retention Castle Nut Eliminates Staking and Thread Locker

Features

  • Patented self-retention thread design locks without staking or thread locker
  • Tool-free installation and removal
  • Mil-Spec compatibility with AR-15/M4 platforms
  • 7075-T6 aluminum construction
  • Hardcoat anodized finish resists corrosion

This castle nut solves the common problem of loose buffer tube assemblies that plague standard castle nuts over time. It works exceptionally well for builders who need reliable retention without permanent modifications or messy thread compounds. The patented self-retention design sets it apart by maintaining consistent torque and preventing loosening under recoil without requiring specialized tools or gunsmith services.

Specifications

  • Brand: Armaspec
  • Model: Self-Retention Castle Nut
  • MPN: ARM6521
  • Material: 7075-T6 Aluminum
  • Finish: Hardcoat Anodized
  • Compatibility: AR-15/M4 Buffer Tubes
  • Colors Available:
    • Black
    • Flat Dark Earth (FDE)
    • OD Green
    • Bronze

What’s Included?

  • 1x Armaspec Self-Retention Castle Nut

Products available on this page:

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

Armaspec Lifetime Warranty

  • All Armaspec products carry a LIFETIME WARRANTY and are warranted to be free from defects in material or workmanship.
  • Should there be a defect, we will repair or replace the product at our discretion at no cost to you.
  • Lifetime warranty does not apply to products sold as “blemished” or “manufacturer refurbished”.
  • You must have proof of purchase to initiate a WARRANTY claim.

Please email to rma@armaspec.com to request an RMA number.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Leave your review
Rating

Customers who viewed this item also viewed these products

Armaspec Self-Retention "No Stake" Castle Nut and QD End Plate

Armaspec Self-Retention "No Stake" Castle Nut and QD End Plate

(1)
$44.99
Armaspec “No Stake” Castle Nut and QD End Plate Combo Eliminates Staking While Adding
LBE Unlimited AR-15 Castle Nut

LBE Unlimited AR-15 Castle Nut

(4)
$7.99
LBE Unlimited AR-15 Castle Nut The LBE Unlimited AR15 Castle Nut is an essential

Strike Industries V2 Enhanced AR-15 Castle Nut with Extended QD...

(4)
$57.95
TRIBUS Enhanced Anti-Rotation Castle Nut & Extended End Plate Introducing the TRIBUS Enhanced Anti-Rotation
Fortis Standard AR-15 Castle Nut - AT3 Tactical

Fortis Standard AR-15 Castle Nut

(2)
$11.35
Lightweight Aluminum Castle Nut Only a third of the weight of a mil-spec steel

Strike Industries Multi-Function End Plate with Anti-Rotation Castle Nut

(2)
$35.95
Strike Industries Multi-Function End Plate with Anti-Rotation Castle Nut The SI Multi-Function End Plate

Strike Industries Enhanced AR-15 Castle Nut with Extended QD Endplate

(2)
$57.95
Elevate Your AR-15 with Strike Industries’ Enhanced Castle Nut and End Plate The Strike
Strike Industries Modular Magazine Catch for AR15 - AT3 Tactical

Strike Industries Modular Magazine Catch for AR-15

$32.95
Improve Your Performance with the Modular Magazine Catch from Strike The Strike Industries Modular
Phase 5 Weapon Systems Oversized AR-15 Magazine Release - AT3 Tactical

Phase 5 Weapon Systems Oversized AR-15 Magazine Release

$21.99
Larger Contact Surface Magazine Release For Easy Access & Faster Reloads The Phase 5
BCM MK2 Receiver Extension for AR-15 - AT3 Tactical

BCM MK2 Receiver Extension for AR-15

$49.95
8 Position AR-15 Buffer Tube for MK2 Recoil System BCM’s MK2 Receiver Extension is

Geissele Ultra Duty AR-15 Mag Release Button

$13.00
Textured and Enlarged Magazine Button Designed for shooters who need reliable controls, the Geissele
AT3 Tactical Castle Nut for AR15

AT3™ Castle Nut for AR-15 Buffer Tubes - 9 Colors...

(102)
$4.49
Secure Your AR15 Buffer Assembly with a Steel Castle Nut This steel castle nut
Armaspec SMB™ Buffer Kit - AR15 GEN3 - Buffer Tube

Armaspec SMB™ Buffer Kit - AR-15 GEN3 - Buffer Tube,...

$86.39
Mitigate Recoil and Elimate Buffer Sound on Your Next AR Build The Armaspec SMB™

Questions & Answers

Don't see the answer
you're looking for?

Loading questions...