You can keep your magazine, but you will need to establish proof that you got
it before July 1. I will do a notarized photo.
But if it has a removable floor plate, even on a 7 round 1911, it is also illegal to trade or dispose of in the state.
Which makes all semi-autos useless. And un-saleable.
Also you must maintain possession of your illegal magazines. Se my post from last night.
I am thinking a quick Court overturn.
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someone else pointed out this idea:
Suppose you want to transfer a hi-cap gun in the future to a specific person, such as a grandson. It would be wise to have that person BUY any needed hi-cap magazine now before the law goes into effect. Or say that person has plans to get a Glock or AR gun in the future. Just buy the magazine now and put it away.