I mean, if I tried to leave with my whole gun collection, I'd need a trailer, got a lot invested...
But consider thus:
A written contract acknowledging, on the date you get the gun, that your wife exempts it from "community property" - you do the same for her when she buys one of those 500 dollar handbags.
Have your WIFE buy each of your guns, and give them to you as a gift - with an accompanying note about it BEING a gift. Gifts are not community property when given to a spouse.
Don't store your guns at home. Don't let your wife know what you own.
Even if you think you "know" a woman for 25 years, during a divorce ALL BETS ARE OFF. She'll be scrambling for advantage, and you will go from the love of her life, to someone she gets a restraining order against - JUST BECAUSE SOMEONE SUGGESTS SHE DO IT. I guess it goes along with my belief and ANYBODY is capable of ANYTHING.
Be careful about selling something to a "friend" at less than market, the courts will frown upon that - if you're going to do a "friendly sale" make sure it's for fair market value, and whatever money you CLAIM changes hands gets used in a lawful manner, like going to Blackhawk.