A3 Industries HDA3 Hybrid Polymer Springfield Kuna Folding Stabilizing Brace
Kuna-specific folding brace with 17-4 stainless steel hinge and 30% glass-filled polymer body.
- Price
- $333
- Weight
- 1 lb 3 oz
- Brand
- A3 Industries
- Category
- Stocks & Braces
Featured in
Features
- •Nitride-coated 17-4 stainless steel hinge
- •Folds left, 3.5 degrees cant down
- •30% glass-filled nylon body
- •Pistol brace sold separately
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A3 Industries Hda3 Hybrid Polymer Springfield Kuna Folding Stabilizing Brace Black
Price History
90-day low $300.84 · at low nowMore PCC guides & articles
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Overview
The A3 Industries HDA3 is a Kuna-specific folding brace developed in partnership with Haga Defense. It bolts directly to the Kuna's rear trunnion with no separate 1913 adapter, which eliminates the stack-up slop universal braces introduce. The hinge is nitride-coated 17-4 stainless steel, and the body is 30% glass-filled nylon.
The HDA3 folds left with a 3.5-degree downward cant, clearing the ejection port and optic when stowed. The aluminum adapter mates to the trunnion with supplied hardware; the brace itself is purchased separately. A3 lists the Gear Head Works Tailhook MOD1, Tailhook MOD1C, and A3 Steady Brace as compatible brace options.
Current feed pricing is $332.50 for the Kuna-specific HDA3 brace assembly, with direct A3 availability as the non-affiliate fallback.
Key Features
- Direct Kuna trunnion mount (no 1913 stack)
- Nitride-coated 17-4 stainless steel hinge
- 30% glass-filled nylon body
- Left-fold with 3.5-degree downward cant
- Accepts Gear Head Works Tailhook MOD1 / MOD1C or A3 Steady Brace
Pros
- +Direct trunnion mount removes 1913 adapter slop
- +17-4 stainless steel hinge, not aluminum
- +Left fold clears optic and ejection port
Cons
- −Brace not included, adds separate brace cost to build
- −Left-fold only
- −Premium price versus the factory Strike FSA option
- −Polymer body reads less premium than all-metal units
Detailed Specifications
- hinge
- 17-4 stainless steel, nitride coated
- body
- 30% glass-filled nylon
- adapter
- Aluminum, direct-trunnion mount
- weight
- 19 oz
- foldDirection
- Left, 3.5 degrees down cant
- msrp
- $332.50
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