STINC’s Groza Kit Turns a PSA Krink Into a Bullpup

Last updated July 2026 · By Nick Hall, covers unusual builds, conversions, and Cold War designs for USA Gun Shop

Quick take: One of the most talked-about items at GunCon 2026 was not a gun at all, but a kit. Stuff & Things Inc, better known as STINC, showed off a drop-in conversion that turns a PSA Krink into a bullpup styled after the Russian OTs-14 Groza. It is a niche, enthusiast project rather than a practical upgrade, but it scratches a very specific itch for AK fans who have always wanted the “Groza at home” look.

• What it is: A drop-in bullpup conversion kit that reshapes a PSA Krink into an OTs-14 Groza-style rifle.
• Key detail: It relocates the trigger forward and adds a Groza-style carry handle with an integrated rear sight.
• Fitment: Built for the PSA Krink in 300 BLK, 7.62×39, and 5.56; the maker says it will not fit anything else.
• Who it’s for: AK hobbyists and collectors chasing a distinctive look, not shooters after a practical carbine.

What STINC showed at GunCon 2026

The STINC Groza kit is a conversion that gives an AK-pattern Krink the silhouette and forward-trigger layout of the OTs-14 Groza. Rather than a whole new firearm, it is a set of parts you install on a host gun. The kit relocates the trigger forward with a new grip module and trigger guard, then uses a replacement internal trigger and linkage to connect that forward trigger back to the AK’s original fire-control group. It tops the package off with the Groza’s signature carry handle, which includes an adjustable rear sight.

STINC describes the design as a dimensionally accurate take on the real Groza that leans on simplified machining and assembly to make it practical to produce. The company is candid that AKs vary in tolerance, so some hand-fitting or light gunsmithing may be required to get everything seated correctly. If you are new to the platform, our AK-47 Buyers Guide is a good place to start before you start modifying one.

The real OTs-14 Groza it is based on

The OTs-14 Groza is a Russian bullpup developed in the early 1990s at the TsKIB SOO design bureau in Tula. Built on the bones of the AKS-74U, it was created to give close-quarters troops a compact, hard-hitting package. The base version was chambered in the subsonic 9x39mm cartridge, while a variant known as the Groza-1 used the more common 7.62x39mm. It was adopted by Russian Interior Ministry forces and saw use with special-purpose units, and it has been a cult favorite among firearm enthusiasts ever since.

That mystique is exactly what the STINC kit is selling. The Groza has always been rare and hard to get in the United States, so a bolt-on way to capture its look on a common AK platform has obvious appeal to collectors. For a broader look at the ecosystem this plugs into, see our guide to the 9 Best 7.62×39 Rifles for 2026.

What you need to know before buying

The kit fits the PSA Krink specifically, and STINC is blunt that it will not drop onto other AKs without significant work. It is built from metal with a black phosphate finish, and the base kit includes the carry handle with rear sight, the forward grip module and trigger guard, and the replacement trigger and linkage. Items like a stock, barrel extension, and wood furniture are sold separately, so a finished build costs more than the kit alone. STINC lists the kit at roughly $425 to $595 depending on configuration, and its store has shown it as now shipping; confirm current pricing and availability directly before you order.

There is also a legal wrinkle worth flagging. STINC warns that installing a stock on a short-barreled Krink without a pinned-and-welded barrel extension will turn the host gun into a short-barreled rifle, which is a regulated NFA item. In plain terms, how you finish the build changes its legal category, so read the maker’s guidance and know the rules for your situation before committing. Anyone deep enough into AKs to want this will also enjoy our list of AK-47 Upgrades That Matter (2026).

Is the Groza kit worth it?

This is a novelty build, and that is the whole point. A bullpup conversion trades the familiar AK ergonomics for a compact, unusual layout, and the forward-trigger linkage will never feel like a purpose-built rifle. If you want a practical, do-everything carbine, a standard Krink or AK does the job better and cheaper.

But if you are the kind of enthusiast who already owns the practical stuff and wants something that turns heads and tells a Cold War story, the STINC Groza kit is a genuinely fun project. It brings one of the internet’s favorite exotic rifles within reach of anyone with a Krink and a weekend. For where bullpups shine as complete guns, browse the 7 Best Bullpup Rifles (2026).

Frequently Asked Questions

Related Reading

• 9 Best 7.62×39 Rifles for 2026
• AK-47 Buyers Guide
• 7 Best Bullpup Rifles (2026)
• AK-47 Upgrades That Matter (2026)