Mount Your HDA3 to the FN SCAR
Are you looking to seamlessly integrate your HDA3 stock or brace with your FN SCAR? This custom-engineered adapter is specifically designed to bridge the gap by eliminating the need for a standard 1913 adapter. If you already own an HDA3 stock or brace and want to make it a direct, hassle-free bolt-on for your FN SCAR without the wobble of unnecessary stacked parts, this is the exact adapter you need.
What Makes the HDA3 SCAR Adapter Stand Out?
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Eliminates the 1913 Adapter: Bypass the standard 1913 Picatinny interface entirely. By mounting the HDA3 directly to the SCAR, you remove unnecessary adapters, eliminating stacked tolerances and annoying wobble for a superior fitment.
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Direct Bolt-On Design: Specifically designed for the FN SCAR platform, this adapter eliminates the need for complex modifications. It utilizes the factory mounting points for a true drop-in fit.
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Perfect HDA3 Integration: Precision-machined to perfectly match the interface of the HDA3 stock and brace, ensuring a tight, solid lockup that feels like a factory original.
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Durable Construction: Crafted from robust 6061-T6 aluminum and finished with a durable anodized Type III hard coat, it is built to handle the heavy recoil impulse of the SCAR platform.
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Streamlined Profile: Designed to maintain the sleek, modern aesthetics of the SCAR without adding unnecessary bulk or weight to the rear of the rifle.
Why Choose the HDA3 SCAR Adapter?
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Remove the Wiggle: Ditch the wobbly 1913 adapter stacks for a much tighter, direct-to-receiver fitment.
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Repurpose Your Gear: Easily transition your existing HDA3 stock or brace onto your SCAR without having to buy a completely new rear assembly.
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Hassle-Free Assembly: Experience a straightforward installation process that takes minutes, right at your workbench.
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Rock-Solid Lockup: Enjoy a rigid, secure mounting solution that won’t compromise your shooting fundamentals.
Specifications:
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Compatibility: FN SCAR 15p, 16, 17, and 20s
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Stock/Brace Fitment: HDA3 Stocks and Braces ONLY
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Material: 6061-T6 aluminum
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Finish: Anodized Type III hard coat finish
Included:
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(1) HDA3 to SCAR Adapter
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Required mounting hardware
Upgrade Your SCAR Today!
The HDA3 Stock & Brace Adapter is the ultimate solution for FN SCAR owners wanting to maximize their modularity. Bolt on your favorite HDA3 setup and experience a modernized, custom feel on your favorite rifle.

















