This is a simple barrel cap for the ASG M40A3 Sportline. It's a drop-in replacement for the existing orange one that will likely come installed on your barrel. Depending on your printer tolerance, you may need to scale this up by a percent or two. Measurements on the model are correct, but circles and threads can sometimes come out rather small, especially in ABS since it tends to shrink a bit.
Enjoy!
Barrel_Cap.stl | 3.1MB |