Springfield Armory Kuna Upgrades — HB Industries Parts Review & Installation Notes

If you’re running the Springfield Armory Kuna, you’ve probably noticed it’s a fun, compact PDW-style firearm that still has a few rough edges. HB Industries reached out and sent over a set of upgrade parts for me to install and evaluate. No money changed hands — just parts, hands-on time, and a straight-up review.

This write-up covers what each HB Industries part does, how it changes the Kuna’s performance, and whether these upgrades are worth installing for everyday shooters, home-defense setups, or PCC-style range builds.

Why Look at HB Industries for the Kuna?

Before diving into the parts, it helps to know who HB Industries is. They’re widely known for precision aftermarket components for:

• CZ Scorpion EVO 3
• CZ Scorpion Micro
• CZ Bren 2
• Various PCC and PDW platforms

Their reputation centers on cleaner ergonomics, improved control surfaces, better triggers, and fixing the “factory compromise” areas most shooters complain about.

With Springfield’s Kuna being one of the most affordable PDW-style guns on the market, it makes sense HB Industries jumped in to refine the platform.

HB Industries Springfield Kuna Upgrade Parts Installed

1. Short Stroke Buffer Kit

One of the biggest performance upgrades you can put in the Kuna.

• Shortens the bolt travel
• Reduces recoil impulse
• Speeds up return-to-battery
• Helps tame muzzle movement

The result is a smoother, quicker-cycling weapon that feels more refined than the out-of-the-box configuration.

2. HB Industries Kuna Trigger

A noticeable improvement in feel and consistency.

• More substantial than the plastic-feeling factory trigger
• Cleaner break
• Less vague take-up
• Boosts shooter confidence during rapid strings

It isn’t a “match trigger,” but it’s absolutely a quality-of-life enhancement.

3. Enhanced Thumb Selectors

4. AK-Style Selectors

Most owners will choose one system or the other, but I installed both to show how each works.

• Improved ergonomics
• Smoother actuation
• More positive engagement
• Options to delete or mirror sides depending on hand dominance

The factory selectors feel vague. These remove that problem entirely.

How These Kuna Upgrades Improve Performance

Upgrading the Springfield Kuna with HB Industries parts enhances the gun in the three places shooters notice most:

Recoil Control

The short-stroke kit tightens up cycling and helps the gun run flatter — big win for follow-up shots and controlled pairs.

Trigger Feel & Speed

The new trigger makes the gun more predictable, especially during rapid fire or defensive-style shooting.

Ergonomics & Manipulation

Selectors become easier to find, faster to switch, and more intuitive to run under stress.

If you already like the Kuna, these upgrades make it better.
If you were on the fence because of the trigger or controls, this solves that.

Range Results After Installing the HB Industries Parts

After installing everything, the Springfield Kuna handled noticeably smoother.

• Less bolt bounce
• Faster cycling
• Cleaner transitions
• More consistent activation of the selectors
• A trigger that finally feels worth the gun’s potential

Reliability remained solid with no failures during testing.

The upgrades don’t turn the Kuna into a different firearm — they refine what’s already there and eliminate several complaints shooters have reported.

Should You Upgrade Your Springfield Armory Kuna?

If you’re building a personal-defense PDW, a compact home-defense setup, or just want a more refined range gun, the HB Industries parts make a big difference.

The Short Stroke Buffer Kit is the star of the lineup, but the trigger and selectors round out the package and give the Kuna a far more polished feel.

These upgrades bring the platform closer to the level it should’ve shipped with — and they do it without breaking the bank.