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Strike Industries FSA Side Folding Stock - 1913 Picatinny Interface, Black - SKU: SI-FSA-STOCK - UPC: 793811766417
Product Description
The Strike Industries FSA Side Folding Stock (SI-FSA-STOCK) is a modular, high-strength shoulder stock system engineered for firearms equipped with a rear MIL-STD-1913 Picatinny rail interface. Built around Strike’s innovative Folding Stock Adapter (FSA) hinge mechanism, this side-folding stock assembly offers lightweight shoulder stabilization, compact transport staging, and intuitive ambidextrous deployment for carbines, subgun platforms, and short-barreled rifles (SBRs).
Constructed from 6061-T6 billet aluminum and steel hinge components with a high-impact composite buttpad extension, the SI-FSA-STOCK features a positive push-button release lockup that eliminates stock play when deployed. The hinge mechanism allows the shooter to configure the fold direction to swivel left or right based on ejection port clear-space and charging handle ergonomics.
Designed with integrated QD sling swivel attachment points and lightweight skeletal cutouts, this Picatinny-mounted folding stock provides an optimal cheek-weld height while preserving slim profile geometry for low-profile bag storage and vehicle transport.
*Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Fits any rifle, pistol caliber carbine (PCC), or SBR equipped with a rear vertical MIL-STD-1913 Picatinny rail interface (e.g., SIG MPX/MCX, Ruger LC Carbine, CZ Scorpion w/ Picatinny endplate, AR-15s with Picatinny stock adapters). Intended strictly for use on registered SBRs or rifle platforms where stocks are legally permissible.
- Verify host firearm is completely clear, magazine removed, and chamber visually and physically confirmed empty.
- Loosen the rear 1913 mounting clamp screw on the stock hinge assembly using the appropriate hex tool.
- Slide the clamp onto the host firearm's rear 1913 Picatinny rail, positioning it at your desired vertical height.
- Torque the mounting clamp cross-bolt securely to manufacturer specifications (35 in-lbs recommended) to ensure zero hinge movement.
- Depress the hinge locking mechanism to verify smooth left-or-right folding action and solid lockup engagement in both folded and extended positions.
Key Features
- Universal 1913 Picatinny Interface: Clamps securely onto any vertical MIL-STD-1913 rear rail section for broad platform compatibility.
- Reversible Ambidextrous Folding Hinge: Hinge housing can be configured by the user to fold left or right to clear controls.
- 6061-T6 Billet Aluminum & Steel Construction: Rigid alloy strut frame resists bending and flex under aggressive target transitions.
- Positive Push-Button Hinge Lockup: Keeps the stock solidly locked in the extended position with zero wobble under recoil forces.
- Integrated Sling Attachment Points: Features built-in QD sling swivel sockets for rapid sling installation.
- Sleek Low-Profile Footprint: Folds flat against the receiver body to maintain a narrow width profile for concealed transit.
Product Specifications
- Brand: Strike Industries
- MPN: SI-FSA-STOCK
- SKU: SI-FSA-STOCK
- UPC: 793811766417
- Interface Compatibility: MIL-STD-1913 Picatinny Rear Rails
- Folding Direction: User-Reversible (Left or Right)
- Material: 6061-T6 Aluminum, Steel Hinge, Polymer Buttpad
- Finish/Color: Matte Black Anodized
- Weight: 12.8 oz
