The Sylvan Arms SA5 Pro Folding Stock Adapter is a right-folding 1913 Picatinny adapter that lets you fold your stock and significantly reduce the length of your rifle for easy stow and travel (brand part no. SA5P-R). SYLVAN ARMS designs the SA5 Pro to sit closer to the AR lower than earlier folders, reducing overall length and closing gaps at the fold point. CNC-machined in the USA from 4140 steel, it uses a standard 1-3/16-inch x 16 thread and works with standard AR-15 bolt carrier groups without extra parts on most builds. It ships with a 1045 steel bolt extension, a castle nut wrench, and every part needed for a quick, tool-light install across platforms from .223/5.56 to .308 and most 9mm.

Key Specifications

• Configured to fold to the right side of the platform.
• CNC-machined in the USA from 4140 steel and weighs only 9.4 ounces.
• Standard 1-3/16-inch x 16 thread works with standard AR-15 bolt carrier groups, no extra parts required.
• Compatible with platforms from .223/5.56 up to .308, plus most 9mm builds, including 300 Blackout.
• Includes a 1045 steel bolt extension for compatible builds.
• Includes a castle nut wrench and installation wrench, so the rifle doesn’t need to be disassembled to install.
• Does not work with Tippmann 22 or LWRC pistols.
• Some 9mm BCGs with a standard 5/8-inch (.625) ID can use the included bolt extension after removing the pin and weight from the back of the BCG.

Frequently Asked Questions

Will this adapter work with my 9mm AR? Most 9mm builds are compatible; some 9mm BCGs with a standard 5/8-inch ID can use the included bolt extension after removing the pin and weight from the back of the carrier.

Does this fold left or right? This SA5 Pro is configured for a right fold.

Is a special tool needed to install it? No, the included wrench handles installation, and the rifle doesn’t need to be disassembled.

Buy the Sylvan Arms SA5 Pro Folding Stock Adapter, Right Fold

Order the SA5 Pro from our Lubbock, Texas gun shop and add a compact, right-folding stock setup to your build. Browse our full AR braces and stocks lineup for more folding options. Ships fast from a Lubbock, TX gun shop.