Hello! With the addition of the 416 coming soon, I just wondered what kind of mods would be available, and wanted to recommend some classics.
The Remington RAHG is a very ~cool~ and elusive addon for the classic HK416, which would be a good high-tier, high ergonomic mod, and it looks incredible with the 10.4 inch barrel. The Giessele handguard would be a good mid-high grade addon as well, but I don't own one, thus no photos.
Next, it would be really cool to see the 416 upper compatible with the M4 lower receiver (and maybe vice versa?). In real life, you do need to make some minor parts modifications, but it would add a ton of variety to modding Western rifles. Here are some photos for inspiration. If the dev team are interested I would be happy to take more reference photos of the rail (replica) or whatever else.