Est. 2014 | USA Small Business

Strike Industries FSA Dual Folder
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Ships today or next day on most orders that are "In Stock". Some orders that are custom or large may take extra time to prepare.
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- Shipping times are estimations. Items that are custom, delayed, rejected, or affected by other acts of god will take additional time.
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Return & Exchange policy:
- Summary: Don't take those sweet Instagram pics and then try to return a used item. Must be within 30 days of delivery.
- Exchanges: Realized you need a different item? That's ok! Exchanges and returns are incredibly easy.
- We are a Small Business: We do the most we can to help with return costs, but we are not Amazon and cannot take hits or losses like Amazon.
- Wrong Items: Mistakes rarely happen. Atomic Defense takes pictures of orders before they are packaged and shipped. We pay for return, recertification, and exchange shipping costs if we ever make a mistake on your orders.
- Rules for Returns: We will deduct refurbishing costs, plus materials and labor, of used products or modified products - or decline the return. This includes, but is not limited to; products with residue, smells, scratches, missing parts, debris, dents and damage. **We reserve the right to refuse returns. Refused returns shipping cost back to the buyer are not covered by Atomic Defense.
- Packaging: Ensure returns are packaged safely with thick padding on all six sides. Failure to correctly package returns may damage products and cost will be deducted from Buyer's account or return refused.
- Bulletproof products: No one else accepts returns on ballistic items. We do.** However, recertification X-Ray costs on returned ballistic items is 20%.
- Starting a return/exchange: Click here
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Strike FSA Dual Folder: Ambidextrous Picatinny Folding Stock Adapter for Ultimate Versatility
- The Strike Dual Folding Adapter is a patented, first-in-market system designed for a Picatinny interface, featuring an intuitive unfolding mechanism.
- Its primary operational advantage is the ability to fold left or right at any time without needing to flip or reconfigure the hinge. This provides operators with unparalleled flexibility in weapon stowage and deployment.
- Deployment is swift and straightforward: a simple pull up on the bar near the hinge and back allows for quick unfolding.
- It incorporates a 3-degree down tilt angle to prevent interference with the weapon's ejection port when folded to the right side, a crucial detail for maintaining weapon functionality.
- It is constructed with a durable steel hinge and lightweight 6061-T6 Aluminum for the base, adapter, and strut, balancing strength with minimal weight. The entire assembly weighs under 10 ounces.
Strike Industries FSA Dual Folder Review
What are some common accessories to add to the Strike Industries FSA Dual Folder?
- FSA Stock End: This is an optional end piece you can add if you are configuring the folder as a stock. It can also serve as a replacement or allow you to alternate between a stock and stabilizer setup.
- FSA Stabilizer End: Another optional end piece, this is used when you want to configure the folder as a stabilizer. Like the stock end, it can be a replacement or allow for alternating configurations.
- Cheek Riser: An optional cheek riser can be added for improved ergonomics and sight alignment. It is important to note this is to be only used legally with the stock setup.
- Strut Lengths: The system allows for interchangeable strut lengths, enabling you to customize the length of pull or overall size of the folding system.

Strike Industries FSA Dual Folder Features and Specifications
The Strike Industries FSA Dual Folder is a patented Picatinny folding adapter offering ambidextrous folding (left or right) without hinge reconfiguration. It ensures a positive lock when folded and facilitates quick deployment. Constructed from a steel hinge and 6061-T6 aluminum, it's lightweight (under 10 oz) and mounts securely to 1913 Picatinny rails via two locking lugs.
Key design elements include a 3-degree down tilt for ejection port clearance and modular adaptability with interchangeable parts (sold separately). The stock version adds 9.18 inches (233.14mm) when extended, 1.02 inches (26.00mm) when folded, and includes an anti-slip buttpad and ambidextrous QD sling points. Users can adjust locking tension with included rubber pads.
Key Features
- Patented Dual Folding Design: Allows folding to the left or right anytime without reconfiguring the hinge.
- Positive Lock & Quick Deployment: Securely locks in the folded position with an intuitive unfolding system.
- Picatinny Interface: Mounts directly to 1913 Picatinny rails with two built-in locking lugs.
- Ejection Port Clearance: Features a 3-degree down tilt to prevent interference when folded to the right.
- Durable and Lightweight Construction: Made with a steel hinge and 6061-T6 Aluminum components, weighing under 10 ounces.
- Modular System: Allows for interchangeable parts such as cheek risers, strut lengths, and stabilizer/stock ends (sold separately).
- Enhanced Ergonomics (Stock Version): Includes a rubber anti-slip buttpad and ambidextrous QD sling points.
- Adjustable Locking Tension: Comes with rubber pads to customize the locking tension when deployed.

What's in the box of the Strike Industries FSA Dual Folder?
- (1) Strike Dual Folding Adapter (fully assembled with stock)
- (4) Rubber Pads (various thickness)
- (1) Torx Tool [T25]
- (1) Warning card

Strike Industries FSA Dual Folder FAQs
What makes the Strike Dual Folding Adapter unique?
The Strike Dual Folding Adapter is the first-in-market patented system that allows you to fold the stock to the left or right side of your weapon at any time without needing to flip or reconfigure the hinge. This provides exceptional versatility for storage and deployment.
How does the Strike Dual Folding Adapter stay in place when folded
When moved into the folded position, there is a positive lock so the Strike Dual Folding Adapter remains securely folded.
How do I deploy the Strike Industries Folding Stock when it's folded?
Deployment is quick and simple: a simple pull up on the bar near the hinge and back allows for quick deployment when folded.
Will the Picatinny Folding Stock Adapter interfere with my weapon's operation?
The adapter features a 3-degree down tilt angle designed to help prevent interference with the weapon's ejection port when folded to the right side.
What kind of interface does the 1913 Folding Stock mount to?
The Strike Dual Folding Adapter mounts directly to a 1913 Picatinny interface and includes two (x2) built-in locking lugs for a secure attachment. It is compatible with almost any 1913 Picatinny rear end.
What materials are used in the construction of the AR Folding Stock Adapter?
The adapter is built for durability with a steel hinge and 6061-T6 Aluminum for the base, adapter, and strut.
How much length does the SBR Folding Stock add to the weapon?
The stock version adds 9.18 inches (233.14mm) to the overall weapon length when extended and 1.02 inches (26.00mm) when folded.
Is the Picatinny Rail Stock modular? Can I add other accessories?
Yes, it is a unique modular system with interchangeable (sold separately) parts like optional cheek risers (to be only used legally with stock setup), strut lengths, and other accessories. You can also get optional FSA Stock Ends or Stabilizer Ends.
How do I adjust the locking tension when the Folding Stock for AR Platform is deployed?
Included rubber pads in various thicknesses are for the two indentations inside the Dual Folding Adapter side that faces the bar. Unfold the adapter and insert the desired rubber pad thickness to adjust the locking tension when fully deployed.
Are there any maintenance requirements for the Dual Side Folding Stock?
Yes, lubrication of hinge and button components is needed for routine maintenance. It's also noted that dirt and/or sand can hinder proper operation of the folding hinge.
Is the Ambidextrous Folding Stock intended for specific firearm setups?
The stock was designed and intended for use with a rifle setup or a registered Short-Barrel Rifle (SBR) setup. Always check with your state and local laws regarding firearm configurations.
Where can I purchase the Strike Industries FSA Dual Folder?
For the Strike Industries FSA Dual Folder and other high-quality tactical gear, check out Atomic Defense, a trusted provider where you can often find this product and receive excellent support.
- We are a Small Business: We do the most we can to help with return costs, but we are not Amazon and cannot take hits or losses like Amazon.
- Lifetime Warranty: Atomic Defense will always stand behind our products. Our lifetime warranty covers any defects and ensures that you never need to worry about parts or the quality of your orders for the entire life of the product.
- Wrong Items: Atomic Defense takes pictures of orders before they are packaged and shipped. We pay for return, recertification and exchange shipping costs if we ever make a mistake on your orders.
- Rules for Returns: We may deduct refurbishing costs, plus materials and labor, of used products or modified products. This includes, but is not limited to; products with residue, smells, scratches, missing parts, debris, dents and damage. **We reserve the right to refuse returns.
- Packaging: Ensure returns are packaged safely with thick padding on all six sides. Failure to correctly package returns may damage products and will be deducted from Buyer's account.
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Start a Return or Exchange
Visit our return portal to begin the self-serve return/exchange process.
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General Products:
- Must be within 30 days of package delivery.
- No need to purchase a shipping label! Atomic Defense will give you a pre-paid one.
Ballistic and Bulletproof Products:
- Most companies will not accept any returns on ballistic or bulletproof items. We offer recertification as a courtesy.
- Must be within 30 days of package delivery.
- No need to purchase a shipping label! Atomic Defense will give you a pre-paid one.
- A re-certification cost of 20% applies to returns of ballistic and bulletproof products.
- The 20% recertification covers the cost of ensuring the armor is safe. Usually starting with X-Raying the armor for cracks underneath the coating, inspection for damage, and water damage testing. Without this 20%, we would not be able to offer returns on armor.
- There is no way for us to know how or if it was used once shipped, and we have to consider them unsafe until retested, inspected and certified.
- Exchanges and non-ballistic products do not have a re-certification cost.