This 3D model represents a replica-style gas mask filter box designed for airsoft, cosplay, and display purposes. Inspired by classic military designs from the era of World War II, it provides an authentic look while remaining lightweight and customizable for modern use.

Designed for use with M4 threaded inserts for secure assembly

The model features a detailed external thread compatible with the standard 40 mm DIN thread (Rd40), allowing it to visually match common gas mask connectors. 

Features:
Realistic replica design for airsoft and cosplay
Compatible with standard 40 mm gas mask thread (Rd40)
Optimized for 3D printing on Elegoo Centauri Carbon
Lightweight hollow body
Easy to modify or scale
Suitable for PLA and also for PETG

Use Cases:
Airsoft gear customization
Display or collection pieces

Important Notice:

This is a non-functional replica and does not provide any filtration or respiratory protection. It is intended for visual and recreational use only.