A3 Industries has officially announced the release of the HDA3 Stocks and Braces, initially launched on March 24, 2025, for early notification list subscribers. This modular stock/brace system, developed with Haga Defense, features a durable steel hinge, all-metal internals, and adjustable length to enhance compatibility with various firearm platforms.
A3 Industries state “The HDA3 was quietly released on March 24, 2025 to be fair to those that have been on the in-stock email notification lists the longest. Now that the initial orders have been placed we are excited to officially announce the release!”
ABOUT THE HDA3
The HDA3 is a modular stock/brace system developed from a collaboration between Haga Defense and A3 Industries. The HDA3 was designed specifically to integrate seamlessly across dozens of firearm platforms without sacrificing strength or aesthetics to do so.
FEATURE PACKED:
Steel Folding Hinge: The HDA3 utilizes a steel hinge assembly, ensuring a strong lockup in the straight and folded position that will not degrade with use. The HDA3 will by default fold to the left-side canted at 3.5 degrees downward.
Strong Bones: The HDA3 is designed with all metal internals for maximum durability. An aluminum cheek riser button and length adjustment latch both interface with an extruded aluminum spine that ties into the steel hinge.
Adjustment: The HDA3’s length can be adjusted in .5″ increments between 7 positions. The cheek riser can be used in three positions. In the lowered position, raised .25″, or raised .50″. Both adjustments can easily be manipulated one-handed.
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