K6-3 Helmet as seen in PUBG

thingiverse

I've printed one of these myself, but be warned that the helmet might not fit your head perfectly due to its interior width being a precise 173mm. You may also want to add some cushioning to the top by gluing a fabric or foam material so it's more comfortable to wear. When printing the visor, consider flipping it forward by 90 degrees if necessary; otherwise, you might need to increase layer resolution to achieve a smoother finish and avoid visible steps.