M-Lok Handguard "BАSTARD" for AR15

M-LOK Handguard “BASTARD” for AR-15

Available Versions

The BASTARD project is available in two sizes:

• BASTARD 13.5-inch / 343 mm

• BASTARD 10-inch / 254 mm

The 10-inch version also includes a 30 mm Picatinny rail.

Important: The 343 mm version fits diagonally on a 256 × 256 mm build plate, including the Bambu Lab P1S. Careful positioning is required.

About the Project

The BASTARD project started as a custom commission and is now shared with the community.

This handguard was designed from scratch specifically for FDM 3D printing.

Its overall appearance combines ideas inspired by several modern tactical handguards. Some visual elements, including the characteristic surface serrations, were inspired by Zenitco products.

Since the project combines features from multiple designs, it is not based on and is not intended to replicate any single commercial product.

Specifications

BASTARD 13.5-inch

• Overall length: 343 mm

• Mounting radius: 17.3 mm

• Required build plate: at least 350 mm in the printing direction

BASTARD 10-inch

• Overall length: 254 mm

• Mounting radius: 17.3 mm

• Additional rail: 30 mm Picatinny rail

Printing Recommendations

The sample shown in the photos was printed using:

• Material: ASA-CF

• Nozzle: 0.6 mm

Engineering materials such as ASA-CF, PA-CF, PETG-CF, or similar reinforced composites are strongly recommended.

Due to the geometry of the model, I recommend printing the handguard at an angle using a custom support bridge or your own carefully prepared support strategy instead of relying entirely on automatic supports.

The 343 mm version fits diagonally on a 256 × 256 mm build plate, including the Bambu Lab P1S. Careful positioning is required.

Compatibility

This model was originally designed for a specific customer and mounting setup.

I have not personally tested it on an airsoft rifle.

Before printing, carefully measure the mounting dimensions of your own replica or project. Different manufacturers may use slightly different specifications, even on visually similar platforms.

Minor sanding, drilling, or fitting may be required depending on:

• printer calibration;

• material shrinkage;

• filament type;

• nozzle size;

• the dimensions of your particular mounting system.

Important Notes

This model is provided as-is for hobby, prototyping, display, and personal projects.

Every printer and material behaves differently. Dimensional tolerances may change depending on layer height, cooling, flow calibration, material shrinkage, and machine geometry.

Test-fit all parts before final assembly. Do not force the handguard onto an incompatible mounting system.

A little sanding or fitting is simply part of the FDM process.