Stern Defense Rapid-Attach Buttstock Adapter: A Tactical Game Changer

Stern Defense has given AR users another option for buttstock usage on their rifles. The Rapid Attach Buttstock Adapter, or RAB-AD, is a device that is installed on the buffer tube and lower receiver that allows the user to attach or detach the buttstock quickly.

According to Stern Defense, the Rapid Attach Buttstock Adapter allows the user to greatly reduce the overall length of the rifle for easy and compact storage or transportation. It all happens within a few seconds, making it a breeze. The RAB-AD is designed, machined, and assembled in the U.S.

Rapid Attach Buttstock Adapter
Stern Defense has another option for AR users with the RAB-AD, or Rapid Attach Buttstock Adapter, for quick and easy detachment of the buttstock from the buffer and lower receiver. The RAB-AD adds only 3.5 ounces and 1.25″ overall to the host rifle. (Photo credit: Stern Defense)

The RAB-AD has a hard-coated anodized 7075 aluminum body for maximum wear protection. The internals is constructed from steel for additional strength while keeping the overall weight to a minimum. The overall weight of the Rapid Attach Buttstock Adapter is 3.5 ounces and adds 1.25” to the length of pull of the host rifle.

The RAB-AD detaches with a push of a button and a quick counter-clockwise turn. When the buttstock is detached, the adapter has a buffer retainer to keep the buffer weight and spring in the tube securely. To attach the buttstock, line it up and rotate it clockwise. The adapter features a steel locking mechanism that secures it automatically.

RAB-AD Features:

  • Designed, machined, and assembled in the U.S.A.
  • 7075 aluminum body and steel internals for lightweight strength.
  • Hard coat anodized for maximum wear protection.
  • Buffer retainer to keep the buffer weight in the tube while disassembled.
  • Buffer spacer compatible with all standard-length AR-15 bolts.
  • RAB-AD weighs 3.5 ounces.
  • Adds 1.25 inches to the length of pull on the rifle.

The Stern Defense Rapid Attach Buttstock Adapter does not require any modifications to the host rifle, and the adapter comes with the required Armorers tool for installation. It is compatible with AR firearms with direct impingement, direct blowback, radial delayed blowback, and gas piston systems. Word of note from Stern Defense that the RAB-AD is compatible with the JP silent capture spring but not with BCGs that have a flared boss at the tail of the carrier. They state that the BCG (bolt carrier group) tail must be .950” or smaller.

The Rapid Attach Buttstock Adapter from Stern Defense comes with an MSRP of $139.95.

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