Hi Jordan, yes the 20" heavy contour barrel is threaded 1/2x28. This model also features a black Hogue OverMolded stock; factory-installed, one piece Picatinny scope base and a paracord sling.
Stay safe & have a great day!

it is threaded with 1.2x28 TPI see ******MODEL NUMBER: 31173 CALIBER: 22 LR
StockBlack Hogue® OverMolded®
Front SightNone
Rear SightNone
Barrel MaterialAlloy Steel

*********Thread Pattern1/2"-28
Twist1:16" RH
Capacity10
Barrel FinishSatin Black
Weight6 lb.

Overall Length38.25"
Barrel Length20"
Grooves6
UPC7-36676-31173-6
Model features a black Hogue OverMolded stock; 20" ******threaded heavy contour barrel; factory-installed, one piece Picatinny scope base and a paracord sling.
https://ruger.com/products/1022Carbine/specSheets/31173.html