Sylvan Arms121686324
SYLVAN ARMS AR15 AR9 RH FOLDING STOCK ADAPTER$174.99
Availability: In Stock
Current Stock: Out of stock
The Sylvan Arms AR15/AR9 left-hand folding stock adapter is a purpose-built solution for shooters who need a compact, maneuverable platform without sacrificing strength or reliability. Built in the USA from CNC-machined 4140 steel, the SA5 gen adapter delivers 250% more strength than its predecessor while weighing just 9.4 ounces—light enough that it won't noticeably burden your rifle, yet robust enough to handle hard use. Whether you're setting up a truck gun, working in tight spaces, or simply want a more packable AR, this left-fold adapter screws on using standard 1-3/16 x 16 threading and locks into place with an improved mechanism that won't rattle or fail.
Installation takes under five minutes and requires no gunsmithing—Sylvan Arms includes all necessary tools and a 1045 steel bolt extension in the box. The included extension lets you run most 9mm bolt carriers (standard 5/8 ID sizing) after a simple pin and weight removal; standard AR15 carriers work without any modification. Adjustable hinge tension lets you dial in the fold resistance to your preference, while dual QD attachment points give you options for sling mounting or accessories.
This adapter is compatible with .223/5.56, .308, 300 Blackout, and most 9mm AR platforms. Note that it does not work with Tippmann 22 or LWRC pistol-caliber builds. The user-serviceable design means you can maintain or adjust it in the field without sending it back to the manufacturer—a practical feature for serious shooters who demand independence from their gear.
| Brand | Sylvan Arms |
| Model | SA5 (Gen 5) |
| Fold Direction | Left-hand fold |
| Material | CNC-machined 4140 steel (adapter); 1045 steel bolt extension |
| Weight | 9.4 ounces |
| Threading | Standard 1-3/16 x 16 |
| Hinge Tension | Adjustable |
| QD Attachment Points | 2 |
| Installation Time | Under 5 minutes |
| Country of Origin | USA |
The Sylvan Arms SA5 works with AR15 and AR9 platforms chambered in .223/5.56, .308, 300 Blackout, and most standard 9mm ARs. It does not work with Tippmann 22 or LWRC pistol-caliber builds. For 9mm bolt carriers with standard 5/8 ID sizing, you'll need to remove the pin and weight from the rear of the bolt carrier group and install the included bolt extension.
No. The adapter comes with all necessary installation tools and a 1045 steel bolt extension, so you have everything needed for a complete install. Standard AR15 bolt carrier groups require no modification—just thread it on and fold. For compatible 9mm carriers, the only step beyond installation is removing the pin and weight from the BCG rear before inserting the included extension.
The SA5 adapter weighs just 9.4 ounces, making it one of the lightest folding solutions available. For comparison, this is significantly lighter than traditional fixed stocks, so folding your rifle results in minimal overall weight increase.
Yes. The SA5 features adjustable hinge tension, so you can customize how much resistance the stock encounters when folding and unfolding to match your preferences and use case.
SKU: 121686752
Availability: In Stock
Current Stock: Out of stock
The Sylvan Arms AR15/AR9 left-hand folding stock adapter is a purpose-built solution for shooters who need a compact, maneuverable platform without sacrificing strength or reliability. Built in the USA from CNC-machined 4140 steel, the SA5 gen adapter delivers 250% more strength than its predecessor while weighing just 9.4 ounces—light enough that it won't noticeably burden your rifle, yet robust enough to handle hard use. Whether you're setting up a truck gun, working in tight spaces, or simply want a more packable AR, this left-fold adapter screws on using standard 1-3/16 x 16 threading and locks into place with an improved mechanism that won't rattle or fail.
Installation takes under five minutes and requires no gunsmithing—Sylvan Arms includes all necessary tools and a 1045 steel bolt extension in the box. The included extension lets you run most 9mm bolt carriers (standard 5/8 ID sizing) after a simple pin and weight removal; standard AR15 carriers work without any modification. Adjustable hinge tension lets you dial in the fold resistance to your preference, while dual QD attachment points give you options for sling mounting or accessories.
This adapter is compatible with .223/5.56, .308, 300 Blackout, and most 9mm AR platforms. Note that it does not work with Tippmann 22 or LWRC pistol-caliber builds. The user-serviceable design means you can maintain or adjust it in the field without sending it back to the manufacturer—a practical feature for serious shooters who demand independence from their gear.
| Brand | Sylvan Arms |
| Model | SA5 (Gen 5) |
| Fold Direction | Left-hand fold |
| Material | CNC-machined 4140 steel (adapter); 1045 steel bolt extension |
| Weight | 9.4 ounces |
| Threading | Standard 1-3/16 x 16 |
| Hinge Tension | Adjustable |
| QD Attachment Points | 2 |
| Installation Time | Under 5 minutes |
| Country of Origin | USA |
The Sylvan Arms SA5 works with AR15 and AR9 platforms chambered in .223/5.56, .308, 300 Blackout, and most standard 9mm ARs. It does not work with Tippmann 22 or LWRC pistol-caliber builds. For 9mm bolt carriers with standard 5/8 ID sizing, you'll need to remove the pin and weight from the rear of the bolt carrier group and install the included bolt extension.
No. The adapter comes with all necessary installation tools and a 1045 steel bolt extension, so you have everything needed for a complete install. Standard AR15 bolt carrier groups require no modification—just thread it on and fold. For compatible 9mm carriers, the only step beyond installation is removing the pin and weight from the BCG rear before inserting the included extension.
The SA5 adapter weighs just 9.4 ounces, making it one of the lightest folding solutions available. For comparison, this is significantly lighter than traditional fixed stocks, so folding your rifle results in minimal overall weight increase.
Yes. The SA5 features adjustable hinge tension, so you can customize how much resistance the stock encounters when folding and unfolding to match your preferences and use case.
SKU: 121686752