Quantity in Stock: Strike Industries Dual Folding Adapter Stock – SI-FSA-DUAL-STOCK
The Strike Industries Dual Folding Adapter Stock (SI-FSA-DUAL-STOCK) delivers a compact and modular rear-end solution for firearm platforms equipped with a 1913 Picatinny rear interface. Built around Strike Industries’ patented dual-folding mechanism, this system allows the stock to fold to either the left or right side of the firearm without reconfiguring the hinge or reinstalling components. This gives builders maximum flexibility for transport, storage, and compact deployment while maintaining rapid access to a full-length stock when needed.
Deployment is fast and intuitive—simply pull up on the hinge bar and swing the stock into position. A positive locking mechanism keeps the stock securely folded or deployed, while a subtle 3-degree downward tilt helps prevent interference with the ejection port when folded to the right side. The assembly mounts directly to a MIL-STD-1913 Picatinny rail using two built-in locking lugs for a secure, stable attachment across a wide range of modern firearm platforms.
Constructed with a steel hinge and 6061-T6 aluminum base, adapter, and strut, the Strike Dual Folding Adapter Stock is engineered for durability while remaining lightweight at under 10 ounces. The included stock end features a rubber anti-slip buttpad to improve shoulder weld and control, while integrated ambidextrous QD sling mounting points provide flexible sling setup options. The modular design also allows users to swap components such as stabilizer ends, cheek risers, and alternate strut lengths (sold separately) to tailor the setup to their build.
Designed for rifles or registered short-barreled rifle configurations with a rear Picatinny mounting interface, the SI-FSA-DUAL-STOCK provides a highly versatile folding solution for modern firearm platforms including AR-based builds and popular factory systems equipped with 1913 rails.
Features
- Exact SKU: SI-FSA-DUAL-STOCK
- Preassembled with stock rear piece for rifle or registered SBR setups
- Patented dual-folding design folds left or right without hinge reconfiguration
- Rapid deployment with simple pull-up hinge operation
- Positive lock when folded
- 3-degree downward tilt helps reduce ejection port interference
- Direct mount to MIL-STD-1913 Picatinny rail
- Two integrated locking lugs for secure attachment
- Ambidextrous QD sling mounting points
- Rubber anti-slip buttpad for improved shoulder weld
- Modular system with interchangeable accessories (sold separately)
Specifications
- Manufacturer: Strike Industries
- Manufacturer Part Number: SI-FSA-DUAL-STOCK
- UPC: 793811766417
- Color: Black
- Interface: 1913 Picatinny rail
- Overall Length Added: 9.18 in (233.14 mm)
- Added Length When Folded: 1.02 in (26 mm)
- Fully Assembled Length: 9.44 in
- Width: 2.09 in
- Height: 4.56 in
- Weight: 9.9 oz
- Construction: Steel hinge, 6061-T6 aluminum adapter and strut, polymer stock
Package Contents
- Strike Industries Dual Folding Adapter (fully assembled with stock)
- 4x Rubber pads (various thicknesses) to tune locking tension
- T25 Torx tool
- Warning card
Compatibility
- Rear-facing 1913 Picatinny rail systems
- Strike AR Picatinny Stock Adapter
- B&T APC9 / APC223 / APC300 / GHM
- Brownells BRN-180 lower receiver
- CZ Bren 2
- CZ Scorpion EVO (with Strike stock adapter back plate)
- Galil ACE
- Ruger PC Charger
- SIG Sauer MCX / MPX
Please Note: Dirt and debris may affect hinge operation. Routine lubrication of hinge components is recommended. This product is not intended for use when mortaring a firearm to clear malfunctions, and normal wear may occur with long-term use of the folding mechanism. Always verify compatibility with your platform prior to installation.
