Hi Michaerl, yes sir, the barrel is threaded 1/2x28
Stay safe & have a great day!

Hi Michael and welcome. Yes Sir, this model has an 18-inch Barrel with a 1/2 x 28 Thread pitch. Cheers, stay safe and enjoy!

yes it is threaded with 1/2x28 threads see ******
Brand Rock Island
Category Rimfire Rifles
Model TM22
Caliber 22 LR
Barrel Length Range 18" to 18.99"
Gun Platform AR-Style
Operating System Blowback
Stock Finish Group Black
Capacity 10+1
Stock Material Aluminum
Action Semi-Auto
OAL 34"
Hand Ambidextrous
Sights None
Size Full Size
Barrel Finish Black Anodized
Receiver Description Picatinny Rail
Grips AR Style
Handguards M-LOK
Trigger Pull Weight 2-3.50 lbs
Height 7.68"
Includes 2 Magazines
Receiver Material Aluminum
******Thread Pattern 1 / 2"x28
Stock Description Fixed
Barrel Description Threaded
Barrel Length 18"
Length of Pull 13"
Max Capacity 10
Receiver Finish Black Anodized
Trigger Flat Face
Weight 6.50 lbs
Stock Finish Black Anodized