About Us

Empowering the Enthusiast: The Next Evolution of Firepower

Redefining the Standard

At GDI-3D, we believe that precision engineering should never be a gatekeeper to performance. Our mission is simple: to bring the world’s most advanced trigger technology to the hands of the people. While our passion and primary expertise lie in perfecting the HK platform, our vision extends to any firearm where performance can be pushed further. We don’t just build components; we bridge the gap between classic craftsmanship and modern firing innovation.

The HK Specialists

The HK roller-delayed system is a masterpiece of engineering, but for too long, it remained a "closed ecosystem" for high-performance triggers. Enthusiasts were forced to choose between the heritage of their MP5 or G3 variants and the rapid-response capabilities found in other modern platforms.

GDI-3D was founded to solve this. We have specialized in developing custom forced reset lowers specifically for the HK lineup, ensuring that the "Gold Standard" of firearms can finally run at the speed of the 21st century.

Innovation Beyond the Platform

While we are the go-to source for HK FRT solutions, our engineering doesn't stop there. GDI-3D is committed to developing FRT solutions for a growing range of firearms. 

Engineering Without Compromise

Every custom lower and trigger system produced by GDI-3D is the result of tireless R&D. We utilize premium materials—from Advanced Fiber Infused Polymers to high-strength tool steel—to ensure that our products don’t just fire fast; they last. Our components are designed for:

  • Specialized HK Integration: Precision-machined for seamless compatibility across the HK-style family.
  • Multi-Platform Development: Adaptable FRT solutions engineered for various firearm systems.
  • Unmatched Durability: Built to withstand the unique recoil impulses and high-use demands of forced reset fire.
  • Tactical Superiority: Giving you a performance edge that was previously reserved for a select few.

More Than a Shop—A Movement

We stand firmly on the belief that the Second Amendment is about the freedom to innovate and the right to access the best technology available. When you choose GDI-3D, you aren't just upgrading your firearm—you’re joining a community that values individual sovereignty and technical excellence.

We are shooters, engineers, and patriots. GDI-3D is dedicated to providing the shooting community with the tools they need to push their gear to the absolute limit.

Elevate Your Build. Reclaim Your Fire.

Ready to experience your collection like never before?

Shop our collection by going to the Home Page or the Catalog.

A Note on Compliance

Transparency is key to our relationship with our customers. While we push the boundaries of innovation, we encourage all our users to stay informed on their local and state regulations regarding trigger technology. Your rights are your responsibility.