Make sure your car's registration sticker is up to date

So I was driving home from playing airsoft and I was like 3 blocks from home. I was on Fullerton Rd turning left on Sordello when a cop turned on his siren lights. I didn't put on the new registration sticker so I was one month out of date. Then the cop saw the airsoft rifle bags in my backseat and asked if he could inspect it. I knew that I had a legal right to say no, but I also know that I had a chance to get away with a warning if I was cooperative. He looked at it and said they were nice. We got to talking about guns and I actually asked him what firearms he had at home lol. There was an awkward moment when I was shivering and he asked me why I was so nervous. I told him that it was 45 degrees outside and my windows were down and my shirt and jacket were soaked with sweat from playing airsoft. Anyway, the guy was nice and let me go without a ticket. Still though, such a pain in the ass for the fact that it started with the registration sticker.