Hello! I'm new here. I have been drooling over the Thompsons for a long time and am now able to buy one. My problem is I live in Washington state. As of July 1st of this year 10 round magazines are all that are allowed in new firearm purchases. So, I have already bought 30 round magazines with the intention of purchasing a Thompson. Now, my question. Will my 30 round mags still work in a new Thompson that will only come with a 10 round mag? Thanks for any info you might be able to provide.