The Sylvan Arms SA5 Pro Folding Stock Adapter, Gen 5 Left Fold (brand part no. SA5P-L) lets shooters fold their AR-pattern stock or brace to significantly shorten the rifle’s overall length for storage and transport. 10 Ring Marketing / WRJ sits the SA5 Pro closer to the lower receiver than earlier folders to minimize length and gaps, and this Left Fold version folds away from the ejection port side on a standard build. Machined from 4140 steel in the USA and threaded to the standard 1-3/16-inch x 16 pattern, it drops onto most AR15 lowers without disassembling the rifle or adding extra parts for standard bolt carrier groups. Among AR braces and stocks, this adapter favors shooters who want a compact, foldable setup across calibers from 5.56 to .308 and most 9mm builds.

Key Specifications

• Available in a left-fold orientation, folding away from the ejection port.
• Fits platforms from .223/5.56 up to .308, and most 9mm builds.
• Threaded to the standard 1-3/16-inch x 16 pattern.
• CNC-machined from 4140 steel in the USA.
• Weighs approximately 9.4 ounces.
• Includes a 1045 steel bolt extension and a castle nut wrench for installation.
• Installs without disassembling the rifle, using the included wrench.
• Compatible with .300 Blackout AR builds.
• Does not work with Tippmann 22 or LWRC pistols.
• Some 9mm bolt carriers with 5/8-inch (.625-inch) ID can use the included bolt extension after removing the factory pin and weight.

Frequently Asked Questions

Which direction does the Left Fold version fold? Away from the ejection port side on a standard, right-hand build.

Does it work with every AR platform? It fits most .223/5.56 through .308 builds and most 9mm builds, but it does not work with Tippmann 22 or LWRC pistols.

Do I need extra parts to install it? No, standard AR15 bolt carrier groups work with the included wrench and no disassembly, though some 9mm BCGs need the included bolt extension after removing the factory pin and weight.

Buy the Sylvan Arms SA5 Pro Folding Stock Adapter

A compact, fold-and-carry setup across calibers is exactly what the SA5 Pro Left Fold delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping.