Name: DD17.2 Rail & Locking Block Kit - Ghost Guns
SKU: DD.17.2_RAIL_KIT
Price: 69.99 USD
Availability: InStock

DD17.2 Rail & Locking Block Kit Overview

The DD17.2 Rail and Locking Block Kit delivers the essential metal components needed to complete your FMDA DD17.2 3D printed Glock 17 frame. This bundle includes precision-formed front and rear rails plus a 17-4 stainless steel locking block—everything required to transform your printed frame into a functional full-size 9mm pistol.

The FMDA DD17.2 is widely considered the most versatile and strongest 3D printed Glock 17 frame design available. Its trouble-free assembly process and improved no-screw rear rail system make it the go-to choice for builders seeking reliability without extensive hand-fitting. This kit is manufactured in the USA from high-quality stainless steel and machined to tight tolerances for perfect fit every time.

What Makes This DD17.2 Kit Different

Precision-Formed Rails
The front rails in this kit are the same high-quality, high-tolerance rails offered in the original FMDA G17 rail kit—proven components trusted by builders worldwide. The rear rails feature an all-new design specific to the DDxx.2 frame series, engineered to work with the improved no-screw mounting system that makes the DD17.2 stronger and easier to assemble than earlier generations.

Frame-Supported Rear Rail Design
The DD17.2’s rear rails are supported by both the frame and the trigger components, creating a dual-support system that’s more rigid than the screw-in rails of previous FMDA designs. To protect these precision-formed rails during shipping, we include a protective holder that maintains proper dimensions until you’re ready to install.

Matched Locking Block
The included Gen 3 full-size locking block is machined from 17-4 stainless steel for exceptional strength and corrosion resistance. This is a direct replacement for Glock Part #1447 and fits all three-pin Gen 3 Glock 17 pattern builds including the DD17.2 and its various remixes.

American Manufacturing
Every component in this kit is 100% made here in the US. The rails are precision-formed from high-quality stainless steel, and the locking block is CNC machined to exact specifications. No overseas sourcing, no quality compromises.

What You Need to Complete Your DD17.2 Build

To finish your 3D printed Glock 17, you’ll need this rail and locking block kit plus a Gen 3 Glock 17 lower parts kit and a compatible Gen 3 Glock 17 slide assembly. The DD17.2 is also compatible with Glock 22 (.40 S&W) uppers if you prefer that caliber. Frame files are available via DEFCAD. Print settings and assembly instructions are included with the file package.

DD17.2 Rail & Locking Block Kit FAQ

What frames are compatible with this DD17.2 rail kit?

This kit is designed specifically for the FMDA DD17.2 3D printed Glock 17 frame and its remixes. The rear rails use the DDxx.2-specific mounting system and are not compatible with earlier FMDA frames or other 3D printed Glock designs that use different rail systems.

Will this locking block work with other 3D printed Glock 17 frames?

The locking block is compatible with any build requiring a three-pin Gen 3 Glock 17 locking block, including the DD17.2 and its remixes. It is a direct replacement for Glock Part #1447. Verify your frame design’s locking block requirements before ordering.

Can I use this kit with a Glock 22 slide?

Yes. The DD17.2 frame is compatible with both Glock 17 (9mm) and Glock 22 (.40 S&W) slides. The rails and locking block are the same for both calibers—you simply need the appropriate slide assembly and magazines for your chosen caliber.

What other parts do I need to complete a DD17.2?

In addition to this rail and locking block kit, you’ll need a Gen 3 Glock 17 lower parts kit (trigger, trigger bar, slide stop, magazine catch, pins, springs, etc.) and a compatible Gen 3 Glock 17 or Glock 22 slide assembly (slide, barrel, recoil spring, upper parts kit).

Where do I get the DD17.2 print files?

The FMDA DD17.2 files are available via DEFCAD. We do not distribute print files directly.

What printer settings work best for the DD17.2 frame?

The DD17.2 prints well in PLA+ and similar materials. The file package includes detailed print settings, but generally the frame prints upright with a 0.4mm nozzle and 0.15mm layer height. Glass-filled Zytel produces an extremely strong frame for those with experience printing engineering materials.

Why do the rear rails come with a protective holder?

The DD17.2’s rear rails are precision-formed to exact tolerances. The protective holder maintains proper dimensions during shipping and handling. Keep the rails in the holder until you’re ready to install them in your frame.

Is it legal to build a 3D printed Glock 17?

Under federal law, individuals may manufacture firearms for personal use without a license. However, state and local laws vary significantly. Some jurisdictions prohibit home-built firearms or have serialization requirements. It is your responsibility to verify the laws in your area before building.

Can I sell a DD17.2 that I build?

Manufacturing firearms with the intent to sell requires a Federal Firearms License. Building for personal use is legal federally; building for sale is a licensed activity. This kit is intended for personal use only.

Kit Contents & Specifications

Included Components: Front rail set, rear rail set with protective holder, Gen 3 full-size locking block

Rail Material: High-quality stainless steel, precision formed

Locking Block Material: 17-4 Stainless Steel, CNC machined

Locking Block Replaces: Glock Part #1447

Compatibility: FMDA DD17.2 and compatible remixes (three-pin Gen 3 Glock 17/22 pattern)

Country of Origin: 100% Made in the USA

Disclaimer: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.