2021 Magazine Tube (and spring) M4 Thread

Hello all, Been away for a very long time, picked up my first 11707 over a decade ago. I've still dropped in on the forums here every so often but between school, work and life stuff I kinda got out of the parts and industry scene. My M4 is still running strong after 1000s of rounds and very little cleaning and maint. Finally bought another. This puts me back in the market for another full length mag tube (and spring?). There are many more options now than there were 10+ years ago. I am

This is a "muted finish"CC titanium tube on my Robar vintage NP3 H20 Benelli. As you can see, in most lighting conditions, it does not match the NP3 plating at all. In some lighting conditions it looks similar but, mostly it looks almost like a parkerized finish. When I first got it, I called Marcie and texted her pictures of it on my gun and asked if they mistakenly sent me a tube for a standard finish M4. She told me no, that this is how the muted titanium finish looks. So, unless I