HDA3
HDA3 Hybrid Polymer Stock - Springfield Kuna
HDA3 Hybrid Polymer Stock - Springfield Kuna
SKU:HDA3-KUNA-A3-S-LF-FDE
Fits these firearms:Springfield Kuna
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Specifications
- Weight: 1.5 lb
- Finish: BlackFlat Dark EarthGreyOlive Drab Green
- Country of origin: USA
Product Description
The HDA3 is a modular stock and brace system developed through a collaboration between Haga Defense and A3 Industries. Designed to integrate cleanly across a wide range of firearm platforms, the HDA3 delivers strength, adjustability, and durability in a familiar, low-profile package.
This direct-fit configuration mounts securely to the factory interface of the Springfield Kuna. The HDA3 is designed, manufactured, and assembled in the USA.
Features
Heavy-Duty Folding Hinge
The HDA3 uses a nitride-coated 17-4 stainless steel hinge for a strong, consistent lockup in both the folded and deployed positions. The standard configuration folds to the left at a 3.5-degree cant. Right-folding configurations are planned for a future release.
Hybrid Construction
Metal internal components provide strength where it matters most. The aluminum cheek-riser button and length-adjustment latch interface with a 6061 aluminum extrusion that connects directly to the steel hinge. Exterior components are injection-molded from 30% glass-fiber-reinforced nylon for a durable, lightweight shell.
Stock and Brace Configurations
The stock configuration includes an injection-molded extension with a textured Santoprene TPE buttpad. The brace configuration includes an injection-molded extension designed to accept compatible arm braces.
Tool-Free Adjustment
The HDA3 offers seven length positions in 0.50-inch increments. The cheek riser can be set to three heights: flush, +0.25 inch, or +0.50 inch. Both adjustments can be operated easily with one hand.
Multiple Sling-Mounting Options
The rear of the HDA3 includes an integrated sling loop and two steel QD sockets. Three additional QD mounting points are machined into the aluminum firearm adapter.
Specifications
- Direct-fit mounting system for the Springfield Kuna
- 6061 hardcoat-anodized aluminum adapter
- Nitride-coated 17-4 stainless steel folding hinge
- Left-side folding with a 3.5-degree cant
- Seven length positions with 0.50" adjustment increments
- 6061 hardcoat-anodized aluminum extrusion
- 7075 aluminum locking latch
- Three-position cheek riser: 0", +0.25", and +0.50"
- Hardcoat-anodized 6061 aluminum cheek-riser button
- 30% glass-fiber-reinforced nylon exterior components
- Santoprene TPE buttpad on stock configuration
- Available in Black, FDE, ODG, and Gray
Length
- Stock configuration: 8.36"–11.36"
- Brace configuration without brace installed: 8.70"–11.70"
Weight
- Stock configuration: 1 lb. 5.6 oz.
- Brace configuration without brace installed: 1 lb. 4.1 oz.
Designed, manufactured, and assembled in the USA.
Definately a solid piece. Had some nicks on the mating surface that was touched up with a black marker. Also a small space of separation ant the mating surface to gun. Other than it seems like a good choice.
5 stars on customer service . . the item meets all requirements and is just as advertised. Perfect fit. Outstanding construction. Would buy again in a sec . Again can’t say enough about the customer service . UPS destroyed the first shipment and before I knew it I had a phone call and replacement item in my hands in less than 48 hours . Well done Bravo Zulu .
Great product, Great quality, Great fit.
Excelente product 100% recommend.
Great fitment no wobble very sturdy made very well. Not your run of the mill cheap stocks that are out there. Would highly recommend to anyone. They also have great customer service
Super happy with this product. Feels and looks great.
Great product really sturdy. Love the adjustments you can do. Strong hold for the fold feature
Really high quality, was much nicer than I expected. Gives the perfect amount of adjustment and feels really solid
This is very much top quality work. Solid stock, well worth the money. Along with the great customer service (Chris) you can’t beat it. I will be doing more business with A3 tactical. I really like how it direct mounts to the Kuna, fit and finish is superb. Thank you.
Looks great! Fit and finish is top tier. Price is high but worth it for the quality. I will post a picture of the completed A3/Haga kuna build as soon as the atf gives me their kind approval to put it all together! :u1F971:
Looks so good. Made my SBR Kuna complete. Love everything about it. Highly recommend.
Great product. Fast shipping. Great staff. Would highly recommend, very well made and functional.
Like this stock alot. We'll built, functional, and looks great. Can't wait to SBR it.
I absolutely love the stock. It made my Kuna what it should be. Much sturdier than the factory brace with its plastic mounting interface. I’d already broken part of the factory rail. As soon as my second Kuna SBR is approved I’ll be buying another.
Great
Great build. Very solid and the side folding hinge is very robust. The stock was very easy to install.
Very nice and well built product. Waiting on my form 1 to get approved to put it on my Kuna.
Just bought this for my form 1/ SBR Kuna. I love the direct mount vs a 1913. Great fit and excellent adjustability.
Phenomenal stock, have 6 HDA3 stocks and cannot wait to add more to my collection
It’s THAT good. Just buy it.
Excellent adjustability and very well made.
I was apprehensive about buying one but now I absolutely love it. It is well built and very sturdy. I’ll be able to depend on it when the chips are on the table. The only thing I found to be a temporary issue is the pivot pin is tough as heck but should ease up some after consistent use. I’m a fan of A3 for sure now and will be doing more business with them very soon. The young guy I spoke to on the phone was very helpful and respectful which goes along way with me!!!
Built solid. Very ergonomic. Looks great.