Description
MPN: ARM6621
FEATURES:
- No-Stake Retention: Patented self-retention thread tech keeps the castle nut locked without staking or thread locker
- Built-In QD Sling Point: End plate integrates a QD socket for fast sling attachment
- Rear Detent Set Screw: Includes a #4-40 × 3/16" set screw for easy takedown detent/spring service
- Light & Durable: 6061 aluminum with Type III hard-coat anodize (Black) or Cerakote (Other color options); weighs just 0.5 oz.
- AR-15 / AR-10 Compatible: Fits standard mil-spec receiver extensions
SPECIFICATIONS:
- Weight:
- Self-Retention Castle Nut: 0.25 oz.
- QD End Plate: 0.21 oz.
- Material: 6061 Aluminum
- Finish: Type III hard-Coat Anodize (Black) or Cerakote (FDE/ODG/Bronze)
COMPATIBILITY:
- AR-15 and AR-10
INCLUDES:
- 1x Armaspec QD End Plate
- 1x Armaspec Self-Retention Castle Nut
DETAILS:
A better buffer tube setup doesn’t have to mean complicated installation. The Armaspec Self-Retention Castle Nut and QD End Plate combo offers a practical, streamlined upgrade for AR-platform rifles by improving both sling integration and system durability—without adding complexity.
No Staking, No Thread Locker—Just Torque and Go
At the heart of this combo is the patented self-retaining castle nut, which uses a unique thread profile to lock in place under torque. That means you don’t need to stake the end plate, drown the threads in compound, or second-guess whether your receiver extension will stay put. Once torqued down, it’s locked—ready for recoil, hard use, and field conditions.
Machined from 6061 aluminum, the castle nut cuts weight at the rear without sacrificing strength, making it a smart swap for weight-conscious builds.
QD Sling Mount, Simplified
The included QD End Plate adds a low-profile sling socket directly at the rear of the receiver, providing ambidextrous attachment options for slings. Whether you’re staging a right-hand or left-hand setup, the design supports quick transitions and clean carry positions.
One thoughtful detail: a small integrated set screw lets you install the takedown pin detent and spring without the usual frustration or spring-launch risk. It’s a simple solution that makes assembly—and future service—easier and cleaner.
Small Upgrade, Big Impact
The Armaspec Self-Retention Castle Nut & QD End Plate kit might seem like a minor detail—but it’s one you’ll notice every time your sling sits just right, or when your buffer system stays tight after a long day at the range. With smart design and durable construction, it’s a quiet upgrade that solves real problems—and makes your AR platform feel that much more dialed in.
