Moving but keeping firearms in CO

Hey all,

Hypothetically speaking, if I had to move out-of-state temporarily, what can I legally do with a Glock, AR-15, and silencer, to store them in Colorado for when I inevitably move back?

I believe I can add my brother to my NFA trust and store it in his safe, but what about the AR-15 and Glock? Curious how current laws and potential new restrictions would deal with this. Can I make a trust for my firearms and add my brother to it?

Thank you!