Help / advice for Gamo Swarm Maxim

New member here, thanks for having me, I'm blown away by all the make$$ and model$$$ of air guns lol I had no idea and always thought people just bought bb guns and pellet guns at Walmart or Academy. 

Bought this gun a couple years ago for blackbirds, possums and other varmints a couple years ago living out in the country. moved to town and we have a HUGE possum and squirrel problem. Well I have the perfect gun for it but it's kinda loud and I don't want some crazy neighbors to be calling the cops for poor little squirrels lol or shooting a gun in the city, it does look like a real firearm with a suppressor on it. 

Also notice when zooming in the scope it's too blurry when trying to see the squirrels in the trees so want a better one, any recommendations on an inexpensive one? I do own a bug buster scope from another rifle, anybody used that one for an air rifle?

So three things, 1. is there anything I can use to quiet it down some? 2. Better scope? 3. What pellets do you all recommend for close range shots like this at 15-30 yards max? 

Thanks in advance for any help
 
The bug buster should work on that Gamo and should have close focus too. Just swap scopes and be sure the scope stop well secured and screws tightened. Try shooting heavier pellets in that gun it may quiet it down. You didn't state caliber so if it's a 177 try 10.4gr Crosman Premier Ultra Magnum and JSB 10.34gr. If 22 then 15.9gr and 18.1gr JSBs Exact.

WELCOME