Regardless what you put on it, its still an MR556
Only the serial number is legally protected on a Title I firearm (unless additional local laws protect other markings). You may grind/mill/Tig-weld the other markings away. You may then remark.
All markings are protected on a Title II firearm. That's why you have to change them before applying.
Anodizing and laser etching is no different than cerakote etc. Its decorative.
The SN is stamped on the grip tang and isn't altered during the anodizing process.
Link to ATF/NFA ruling?
I'm beleive there is not one, because this is the first ive heard this saying you can't alter a title II firearm...when you can.
Remaking your MR556 before you form 1 it is an absolute must. Yes it is silly, but that’s how it goes. You can’t remark it afterward. Info on form needs to match your gun.
Also. As some have indicated before. Do NOT send any new work to Jayson at IGF. Feel free to PM as to why.
The original HK laser etching isnt even deep enough for firearms marking by the books. The laser etching is meaningless.
The roll marks/stamping on the grip tang is the proper firearm data, which is unaltered in any coating process.
So if the Brownell's BRN-4 is re-stamped to "416 D" would you use that as the model designation in your Form 1? Or still use BRN-4?