What to do with 10 round magazines?

[YoungJoe]

Keep 'em. Plenty of drills you can do that call for reloads with fewer than 10 rounds.

My favorite is the 5 by 5:
5 yards
5 rounds
5 seconds
5" circle for a target
Do it 5 times.

Buddy snorted when he saw me try it for the first time....then he tried it. Now it's one of my "Am I still sharp?" self-tests.

If you have enough low-cap mags to do this already, it will save the wear and tear on your new hi-caps. (But, you know, shoot the crap out your new ones, too)

[DrjonesUSA]

I just keep them loaded and put away, being shorter than my 30 round and the 60 round Magpul D-60, they can still be useful for shooting from the bench.

[Ol'Chap]

I'd use 'em like "legos to build a white house".

[Paperchasin]

Just keep them like everyone said.

[Phalanx20mm]

I sent them to friends in CA since I live in America.

[Scratch705]

Looks like op will continue to have to use them. Lcm still out of reach for regular ca citizen

[stevec223]