I'm sorting through and keeping an eye out for mags as I wait for the money to flow in to buy my parts for my AR. I'm wondering something about the mags. I know NY has a 10rnd capacity limit, but what about modifying a 30rd so that it can only hold 10rnds? 30rnd mags are a dime a dozen, whereas 10rnds, or even the 10/30's are not entirely easy to find.
My brother-in-law has informed me that he's got a bunch of 30rnd mags from his Marine brother, ready to give me for Christmas. my fear is that these mags will land be in jail for Christmas if they can't be modified.