The Armaspec Self-Retention Castle Nut is a lightweight AR-15 component designed to simplify buffer tube installation while improving long-term retention. Its self-retention thread design uses patented locking geometry to eliminate the need for staking or thread locker, maintaining a secure fit under repeated use. Machined from 7075-T6 aluminum, the structure offers a high strength-to-weight ratio suitable for performance-driven, lightweight rifle builds. A hardcoat anodized olive drab green finish provides increased resistance to wear and corrosion. This item is made in the USA.
Features:
- Self-retention thread geometry with no staking or thread locker required
- Precision-fit for improved retention and minimal movement
- Constructed from 7075-T6 aluminum
- Hardcoat anodized for corrosion and abrasion resistance
- Installs without special tools
Specifications:
- Color: Black, FDE and OD Green
- Finish: Hardcoat Anodized
- Material: Aluminum – 7075-T6
| Weight | N/A |
|---|---|
| Dimensions | N/A |
| Color | Black, Bronze, FDE, OD Green |
| MPN | ARM6521-BLK,ARM6511-RED,ARM6521-FDE |
| UPC | 810048494019, 810048493999, 810048494095 |
Compliance
NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.
