10 Ring Sylvan Arms SA5 Pro AR-15 Folding Stock Adapter Gen. 5 Left Fold
$171.60
Fold your AR-15 stock to significantly reduce rifle length for compact storage and travel. The SA5 Pro adapter sits close to the lower receiver to minimize gaps.
6 in stock
The Sylvan Arms Folding Stock Adapter allows you to fold your stock and significantly reduce the length of your rifle for easy stow and travel.
The SA5 Pro AR Folding Adapter sits closer to your AR lower to reduce the length and any gaps. Turn your rifle into a foldable AR providing a compact rifle setup.
The direction of the fold is orientated to the direction as if your build was pointed down range. On a standard build Folding to the RIGHT folds toward the ejection port. Folding to the LEFT folds off to the side without the ejection port. Our previous folders have folded off to the LEFT
Features:
- Available as a left or right fold pick the best AR side folder setup to fit your needs.
- Compatible with most AR15
- Standard 1-3/16” x 16 thread and does not require any additional parts to be used with standard AR15 Bolt Carrier Groups.
- CNC-machined in the USA from 4140 Steel and weighs only 9.4 ounces.
- The included wrench makes for a quick and easy install. The product does not need to be disassembled in order to install it onto your rifle/pistol.
Simply screw on fold and carry!
Product Details
- Includes a 1045 Steel Bolt Extension
- Includes a castle nut wrench
- Fit: Platforms .223/5.56 to .308 & Most 9mm
- Does NOT work with Tippmann 22 or LWRC Pistols
- Some 9mm bolt carriers with standard sizing 5/8 ID (.625) can use the included bolt extension after removing the pin and weight from the back of the BCG
- Compatible with your 300 Blackout AR’s for an effortless 300 Blackout Folding Stock Setup.
- If your bolt carrier group is causing the bolt extension to come up short contact us for a conversion. (Currently unavailable)
- Includes all items needed to install.
| Weight | 1.004 lbs |
|---|---|
| Dimensions | 8.850 × 6.000 × 2.500 in |
| Manufacturer | 10 Ring |
| Weight | 9.4 ounces |
| Material | 4140 Steel |
| Compatible With | most AR15 Standard 1-3/16” x 16 thread |
PROCESSING & SHIPPING
Orders typically ship within 1–3 business days (Monday–Friday) after payment and all required documentation are received. Time to arrival after shipment depends on the carrier. Shipping method is at BT Gun Company’s discretion; ammunition and oversized accessories are charged at actual shipping cost. We do not ship to Hawaii or Alaska.
FIREARM TRANSFERS
- Firearms must ship to a licensed FFL dealer of your choosing — confirm with them first that they can accept the transfer.
- Your receiving FFL will need to email their license to [email protected] before we can ship.
- Inspect your firearm at your FFL’s location before signing ATF Form 4473 — once signed, the firearm is considered accepted.
You’re responsible for knowing the firearms laws in your state before ordering. For complete shipping, returns, and restocking-fee policy details, see our Shipping & Returns page.

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