Drug dealer neighbor pointed gun at me when I went outside to investigate a loud noise. Advice?

We live in a little townhome neighborhood where the townhomes face each other. Early this morning, I put a brisket on my pellet smoker and about an hour later, heard this loud popping noise. I’m thinking my grill exploded or something so I went outside to investigate. I peaked around the corner and my neighbor is outside his house with like 3 other guys pointing a handgun at me asking “wtf the f**k was that noise?” All while continuing to point the gun at me. I backed away and said I don’t fucking know, that’s why I’m out here. He said someone threw s**t at his window. I said I didn’t know anything about it and that it could have been my grill making that noise. He then went “oh sorry bro” and went inside.

Now this isn’t the first time he heard a loud noise and came outside with a gun. My gf said a few days before 4th of July, he came out with a “golden ak47” after hearing a loud noise. Which was probably someone just popping fireworks. I am pretty sure they are dealing drugs out of that house. They always have people coming and going and all drive very nice cars for the neighborhood. Talking about BMWs, Mercedes, Maseratis, seen some lambos around too. I’ve seen someone bring in giant duffel bags into the house before.

Now what should I do? Should I call and report it to the cops? That he was waiving a gun around? I get someone protecting their house, but if your protecting your house from people wanting to rob you for your drugs/money, that’s a different story. I feel like that will only cause problems for me if I do. what do y’all think?