I am going to be moving to Denver, Colorado and leaving my car at the airport as I will be driving from Charlotte, where I live now. I do know that Colorado has there high-cap magazine ban and that it applies to all magazines manufactured after the date the ban went into effect. However, I purchased my S&W M&P 9mm and have 2 spare mags before the magazine ban went into effect. My worry is that when I go to the airport to check it with TSA that I may either get hassled by an ignorant officer, whether it be a TSA agent, themselves or the local Denver police for having a magazine over 15 rounds. I'm wondering if anyone thinks I could run into any problems when I go to the check-in? When I flew from Charlotte, NC to Seattle, WA I had no problem at all checking in my gun and I think I know the whole process now. However, I've never flown out from Denver or Colorado and not sure what kind of hassle I can run into, especially from ignorant police or agents. I cannot assume my smooth TSA check-in Charlotte could be the same way at Denver. I do have a S&W M&P 45 that use to be my only carry gun and only has 10 rd capacity. I thought about leaving my 9mm behind and just bringing the S&W M&P 45, that way I won't have to worry about it. However, I'd just like to hear other people's experiences if they ever were in this situation and what they think about flying with checked firearms from Denver International, in general. Thank you.