Ruger 77/22 bolt action suppressed, 1 pound trigger by Volquartsen, Leupold 3x9 with adjustable objective.
Ammunition is Winchester subsonic 40 grain hollow point the ones MADE in Australia no longer available in states, I believe, hardest hitting subsonic I've ever seen.
I've had and used this rifle for 20 years and it's killed hundred of squirrels, and many other varmints extremely accurate.
This 4 shot group was shot at 50 yards benched solid with not a hint of wind, a squirrels worst nightmar