Stern Defense 008Sdrabadd1M Rapid Attach Buttstock Adapter Black Aluminum/Steel

The Stern Defense Rapid Attach Buttstock Adapter is a quick-detach solution built for AR platform shooters who need flexibility in stock configuration and compact storage. This black aluminum and steel adapter lets you swap or remove your buttstock or pistol brace in seconds—no gunsmithing, no permanent modifications. Twist, click, and go: push the button and rotate counter-clockwise 30 degrees to detach; align and twist clockwise to re-attach, and the steel locking mechanism secures itself automatically. It's built from 7075 aluminum with steel internals and hard-coat anodized for durability, weighing just 3.5 ounces while adding only 1.25 inches to your length of pull.

Designed and assembled in the USA, the Rapid Attach Buttstock Adapter works across gas piston, direct impingement, direct blowback, and radial delayed blowback AR systems. The included buffer retainer keeps your buffer weight secure when disassembled, and the buffer spacer is compatible with all standard-length AR-15 bolts. It's also compatible with JP silent capture springs. Armorers tools are provided—you'll only need a 3/8 ratchet wrench for installation. Note that it's not compatible with bolt carriers that have a flared boss at the tail; the carrier tail must measure .950" or smaller.

If you run multiple upper or lower combos, or you simply want the ability to swap between a buttstock and a pistol brace configuration without swapping the entire rear assembly, the Rapid Attach Buttstock Adapter delivers that modular flexibility with rock-solid durability.

Key Features

• Quick-detach design: 30-degree twist removes or installs in seconds
• No modifications required to your firearm
• 7075 aluminum body with steel internals for strength and light weight
• Hard-coat anodized finish resists wear
• Buffer retainer and spacer included for AR-15 compatibility
• Works with gas piston, DI, blowback, and delayed blowback systems
• Compatible with JP silent capture springs
• Designed and assembled in the USA
• Armorers tools included

Specifications

Frequently Asked Questions

What AR platforms does the Rapid Attach Buttstock Adapter work with?

The adapter is designed for AR-15 and AR platform rifles using gas piston, direct impingement, direct blowback, or radial delayed blowback systems. Your bolt carrier group tail must measure .950" or smaller—it is not compatible with carriers that have a flared boss at the tail.

How quickly can I swap stocks or braces?

The adapter lets you detach or re-attach your buttstock or pistol brace in seconds. Push the button and twist counter-clockwise 30 degrees to remove; align the pieces, push in, and twist clockwise 30 degrees to re-attach. The steel locking mechanism secures automatically.

What's included and what tools do I need?

The adapter comes with armorers tools and a buffer retainer and spacer for AR-15 compatibility. You'll only need a 3/8 ratchet wrench to install it.

Is this adapter compatible with my JP silent capture spring?

Yes, the Rapid Attach Buttstock Adapter is compatible with JP silent capture springs.