Compact. Rugged. Mission-Ready.
The Stern Defense RAB-AD (Rapid Attach Buttstock Adapter) gives your AR the ability to quickly detach and reattach the stock or brace—no tools, no modifications, no wasted time. Whether you're storing your rifle in a tight case, packing for transport, or streamlining your setup, the RAB-AD makes it simple and secure.
Machined in-house from 7075-T6 aluminum with steel internals, the RAB-AD is built for durability without adding unnecessary weight. Compatible with direct impingement, gas piston, blowback, and radial delayed blowback systems, this adapter is ready to handle any configuration in your AR-15 or similar platform.
✅ Why It Works
- Tool-Free Operation – Detach or reattach your stock or brace in seconds
- Secure Fit – Steel locking mechanism keeps things tight and consistent
- Compact & Lightweight – Adds only 1.25" to LOP and weighs just 3.5 oz
- Universal Compatibility – Works with most AR-15 BCGs and systems
- Precision Machined In-House – Designed, built, and assembled at Stern Defense HQ
✅ How It Works
- To remove: Push button + twist counter-clockwise 30°
- To attach: Align + push + twist clockwise 30° to lock
Steel locking components handle the rest.
✅ Tech Specs
- 7075-T6 aluminum body
- Hardened steel internal components
- Hard coat anodized finish
- Integrated buffer retainer
- Includes buffer spacer (compatible with all standard AR-15 bolt carriers)
- Compatible with JP Silent Captured Spring
- Weight: 3.5 oz
- Adds: 1.25" to length of pull
⚠️ Compatibility Notice
The RAB-AD is not compatible with BCGs that have a flared boss at the rear. The tail diameter must be .950” or smaller.
✅ Installation
Comes with required armorer tools. Just bring a 3/8" ratchet wrench and you're good to go.
