Name: Brawler Build Kit - Ghost Guns
SKU: HARLOT_BRAWLER
Price: 29.99 USD
Availability: InStock

Brawler Build Kit Overview

The Brawler takes the proven Harlot platform and wraps it in a knuckle duster frame that’s equal parts functional firearm and conversation piece. This single-shot .22LR break-action derringer includes the same reliable operation as the original Harlot in a grip style that’s genuinely unique in the 3D printed firearms space.

This build kit includes the .22LR rifled barrel liner, springs, all mounting hardware. The Brawler shares the same fire control group and breech design as other Harlot variants—proven components with thousands of successful builds. Print the frame, assemble the kit, and you’ve got a working .22LR pistol that looks like nothing else on the range.

What Makes the Brawler Different

Distinctive Knuckle Duster Design
The Brawler’s four-finger grip frame isn’t just for aesthetics—it provides a secure, natural hold that keeps the pistol locked in your hand during firing. The grip geometry distributes recoil across your knuckles rather than your palm, creating a different shooting experience than traditional derringer designs.

Proven Harlot Internals
Under the unique exterior, the Brawler uses the same fire control group, breech design, and barrel system as other Harlot variants. This isn’t an experimental platform—it’s a proven .22LR action in a new package. The break-action design is simple, reliable, and easy to understand.

Beginner-Friendly Assembly
Like all Harlots, the Brawler was designed for accessibility. If you can operate a 3D printer and turn a screwdriver, you can build this pistol. No press-fitting, no drilling beyond basic deburring, no machining. The assembly process follows the same steps as the original Harlot—video tutorials apply directly.

BrassTax Option Included
The designs are identical—BrassTax simply uses brass material for the frame instead of printed plastic. Brass stock is not included in the kit, but the files are there if you want to machine your own metal version.

What’s in the Brawler Build Kit

Components
.22LR rifled barrel liner (requires chambering), hammer spring, and all necessary springs for the fire control group. These are the same proven components used across the Harlot family.

Hardware
M3 bolts in required lengths, M3 nuts, and hex key for assembly. Everything needed to complete the build except the UFA-required metal weight.

Brawler Build Kit FAQ

Is the Brawler Build Kit a complete firearm?

No. The Brawler Build Kit contains hardware and barrel components only. You must 3D print the Brawler frame and other structural components separately using the files found at DEFCAD.

What printer do I need to build the Brawler?

Any standard FDM printer with a typical build volume will work. The Brawler was designed to print on entry-level machines without specialized modifications. PLA+ is the tested and recommended material.

How is the Brawler different from other Harlots?

The Brawler uses the same fire control group and barrel system as other Harlot variants but features a distinctive knuckle duster grip frame. Internally, it operates identically to the standard Harlot—the difference is entirely in the grip and frame design.

What is BrassTax?

BrassTax is the brass-framed version of the Brawler. The Brawler kit does not include brass material—if you want to build a BrassTax, you’ll need to source and machine your own brass stock.

Does the barrel liner come chambered?

No. The barrel liner must be chambered with a #1 wire gauge drill bit and carefully deburred with a small round file or countersink tool before installation. Watch the Harlot assembly tutorial video for detailed instructions on this process.

What tools do I need to complete the build?

Hex driver for M3 screws, #1 wire gauge drill bit for chambering the liner, small round file or countersink for deburring, epoxy for securing the barrel liner, and wire cutters to trim springs to length. A soldering iron is helpful for installing heat-set inserts.

How does the half-cock safety work?

The Brawler features a half-cock position on the hammer. If you store the pistol with a round chambered, always keep the hammer at half-cock. This is a passive safety feature—not a recommendation to store loaded firearms.

Is the Brawler legal to build?

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 entirely. It is your responsibility to verify the laws in your area before ordering.

Can I sell a Brawler 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.

Legal Compliance

The Brawler is designed for legal home manufacture under federal law. Key compliance features:

Rifled Barrel: Kit includes a rifled .22LR barrel liner. Using a smoothbore tube may classify the firearm as an AOW under the NFA. Always use the rifled liner provided.

Metal Weight Requirement: Under the 1988 Undetectable Firearms Act, this build requires 3.7oz of stainless steel to be placed into the printed spacer before assembly. Metal weight is not included in this kit—builders are responsible for sourcing and installing the required weight.

State Laws Vary: Some states prohibit home-manufactured firearms. Know your local laws before ordering.