GG&G Agency Rear Sling Looped Attachment for Collapsible Stocks offers the end user a more consistent fit than earlier versions. Some of the recoil tubes being produced are smaller in diameter than the originals or Mil-Spec units. With this design by G.G.&G. securely fastening onto the castle lock nut, various size recoil tubes are no longer an issue. In addition, the new design does not interfere with the charging handle operation, even the larger units like the Gas Buster. The looped versions are specifically designed to accommodate the HK style quick clips or snap hooks.
The Agency Rear Sling Adapters by GG&G were developed because certain government agencies established policies indicating that if a tool needs to be used to remove a part of the weapon to install a new accessory, it cannot be done unless the gun is sent to the agency's armorer or gunsmith for the installation. This caused a major problem for some agencies looking to update their weapons due to time constraints and the absence of local agency armorers. The GG&G Agency Looped Rear Sling Adapter only requires that the rear assembly of the collapsible buttstock be removed. No tools required. The stock sling adapter then slides over the tube and, once in proper position securely tightens around the castle lock nut as shown in the photos.