Going out of state (CA) and taking my AR-15 Sport which I have range fired several thousand rounds (5.56/.223) using the CA compliant 10-rnd mag. Can I use a 30-rnd mag w/o having the button removed? When I bought it the gun shop said yes and also said it's an easy fix to remove the button. I will be bringing it back to CA however, but would like to see what it feels like with a full mag...free state here I come!