It's finalized I'm moving to Colorado. Because of this, as much as I heard many, many different sides of the mag issue in the state (and contacted CO law enforcement), I was generally advised bringing 15+ mags into CO no matter any workaround or law on the books would be a bad idea. Because I'm a "play it safe" kinda guy, I sent all my mags for my various firearms out to a gunsmith out here prior to moving to have them permanently magblocked using mag blocks from magblocks.com
Maybe unlike some, 15 rounds is fine for my needs at the range. And IDK, after move #3 (counting this upcoming one) I'm ready to be done moving. So I'm okay that the work is irreversible.
That way I can keep all my current mags but remain compliant. I'm probably going to get tons of crap for this, but I'm doing it now while I have time. That, and I have my feelings on this. My gunsmith is also going to write me a letter stating the work done and that the mags are CO compliant, if I ever need it.
Stay tuned. Don't have them back quite yet.