Functional Airsoft Suppressor for Ares Amoeba Striker AS-03

This design is intended exclusively for airsoft replicas and is not designed, tested, or intended for use on firearms.

A functional suppressor designed for the Ares Amoeba Striker AS-03 airsoft rifle, with expected compatibility with the AS-01 and AS-02 models.

The primary design goal was to reduce the initial muzzle report, particularly in the mid and mid-high frequency ranges, which contribute most to the perceived loudness and sharpness of the shot (even though lower frequencies generally propagate more efficiently over distance).

The suppressor features a 6-chamber progressive baffle system with side vent ports near the entrance to provide rapid and balanced venting of excess air pressure. To ensure proper alignment with the rifle barrel, the design incorporates an extended guide section through which the inner barrel passes.

In addition to the printed parts, the assembly requires:

• 4 screws for attaching the outer tube to the base section

• 2 foam rings, each 10 mm thick (dimensions shown in the images)

The screw pilot holes are 1.7 mm in diameter and are intended to be drilled to suit the chosen screws. Maximum recommended screw length is 7 mm. I used 2 × 5 mm self-tapping screws.

The suppressor primarily reduces sound levels in the mid-frequency range and shifts part of the acoustic energy toward lower and high frequencies. As a result, the shot is perceived as less sharp and less attention-grabbing.

The current design is still a work in progress. One known issue is that the end cap may occasionally come loose. I plan to address this in a future revision by replacing it with a threaded design.

Spectral analysis indicates not only a reduction of the mid- and high-frequency components, but also a slight increase in lower frequencies. A small increase can also be observed above approximately 17 kHz. However, frequencies in this range lie near the upper hearing limit of many adults and contribute relatively little to the perceived loudness of the shot. These effects can be seen in the attached spectrograms.

Average indoor sound measurements obtained with a standalone sound level meter:

• Without suppressor: approximately 75.2 dB

• With suppressor: approximately 68.9 dB

This corresponds to an average reduction of 6.3 dB.

Measurements were performed indoors using a consumer-grade sound level meter. Actual results may vary depending on ammunition, hop-up settings, environment, rifle configuration, and measurement method. The audio samples were recorded using a smartphone and processed and converted into spectrograms using the WaveEditor application for Android.

The presented measurements, analysis, and design decisions should be regarded as the results of my own amateur experimentation, research, and implementation rather than a professional work. The attached data are provided primarily for comparison and documentation purposes.

For the external surfaces, I applied the Fuzzy Skin feature in the slicer. This serves two purposes:

• reducing surface reflections and gloss, making the suppressor less visually conspicuous.

• potentially helping to disrupt surface resonances.

Depending on printer calibration, minor post-processing may be required for optimal fit. In my case, only a small amount of residual material had to be cleaned from the barrel guide path, and no additional fitting was necessary.

Maintenance and Safety Notice

To ensure safe operation and maintain accuracy, the suppressor should be inspected regularly for dirt, debris, wear, or damage.

In rare cases, contamination inside the BB path may cause a projectile to deviate from its intended trajectory, potentially resulting in impacts on and damage to the internal baffles. If any dirt, debris, deformation, or damage is observed, the suppressor should be disassembled, cleaned, and any damaged baffles replaced before further use.

For this reason, the end cap is intentionally removable to allow inspection, maintenance, and replacement of internal components. Although a future revision may use a threaded attachment for improved retention, the suppressor will remain serviceable and user-accessible.

By downloading, printing, assembling, or using this design, you acknowledge that you do so entirely at your own risk. I accept no responsibility or liability for any injury, damage, loss, or other consequences resulting from the use, misuse, modification, assembly, or failure of this design.

Print Settings

• Printer brand: Prusa

• Printer: I3 MK3S

• Rafts: No

• Supports: No

• Resolution: 0.3mm

• Infill: 40%

• Filament material: PETG