I call it the heavier arms. There needs to be some sanding because it wont fit right in. Every printer is different. Once you sanded/cut to the correct size, It will hopefully fit snug like factory. Hope you guys enjoy and check out my other designs. Feel free to leave any comments. Check out my page for more customs.
There is also a group on facebook just for 3d printing for gunpla. I recommend you to join if you are interested. It's called 3d Printed Gunpla.
If you like what you see, and would like to support me, please donate to my patreon. This will help further my creativity and create more customs quickly.