Strike Industries FSA Dual Folder Stock — QD Sling — Black
The Strike Industries FSA Dual Folder is a patented first-in-market 1913 Picatinny folding adapter that solves the long-running annoyance of single-side-fold mechanisms: you can fold this stock to the LEFT or to the RIGHT, on demand, with no re-configuration of the hinge. A simple pull-up of the hinge bar selects the fold direction; a positive lock keeps the stock from rattling when folded; and a 3° downward tilt prevents the folded stock from blocking the ejection port. The buttstock module bolted to the front of the hinge is a clean, lightweight design with ambidextrous QD sling mounting points and a rubber anti-slip buttpad. Tension at the hinge can be tuned via adjustable rubber pads (multiple thicknesses included), so you can dial in exactly how much force is needed to deploy or fold the stock.
Key Features
- Patented dual-direction folding hinge — fold LEFT or RIGHT without re-configuration
- 1913 Picatinny mounting interface, dual locking lugs for a tight, rattle-free lockup
- 3° downward tilt when folded — keeps the stock clear of the ejection port
- Ambidextrous QD sling mounts on the buttstock
- Adjustable hinge tension via included rubber pads of varying thicknesses
- Rubber anti-slip buttpad
- Steel hinge with 6061-T6 aluminum base, adapter and strut
- Modular design — interchangeable parts available separately
Specifications
| Manufacturer | Strike Industries |
|---|---|
| Manufacturer SKU | SI-FSA-DUAL-STOCK |
| Materials | Steel hinge, 6061-T6 aluminum base, adapter and strut |
| Extended Length | 233.14 mm (9.18 in) |
| Folded Length Added | 26.00 mm (1.02 in) |
| Fold Tilt Angle | 3° downward (avoids ejection port) |
| Mounting Interface | 1913 Picatinny with dual locking lugs |
| Weight | Under 10 oz (under 283 g) |
| Compatibility | Rifles or registered SBRs with 1913 Picatinny rear interface |
What’s in the Box
- 1 × FSA Dual Folder Adapter and Buttstock assembly
- Rubber tension pads (multiple thicknesses)
- 1 × T25 Torx tool
- 1 × Warning card






























