[A CA Guy]

It might make purchase sales or exchanges of a gun after the first purchase illegal.

You won’t be able to inherit a gun collection.
Some may create a national gun registry using this.

Not good IMO.

[GailA]

http://www.breitbart.com/Big-Government/2014/01/24/Supreme-Court-Is-It-Legal-For-Law-Abiding-Citizens-To-Buy-Guns-For-One-Another

This answers the purchase question. But it does not answer trust or wills.