Hi Brian and welcome. Fortunately, this model/upc is non-threaded and legal in the State of Illinois. -- https://rangeusa.com/product/taurus-tx-compact-22-pistol-black-.22lr-3.6-barrel-threaded-10rd-non-manual-safety?srsltid=AfmBOor9D_ja-QdQoRN2ujteHt5WpYR_nmcCCx05XoVfl9R6DUOI1ZlP ----------- Cheers, stay safe and enjoy!

The model you are asking about does not have a Threaded barrel, i searched using the UPC.
Taurus TX22C Features
The TX22C is a representation of Taurus's expertise in producing reliable and user-friendly firearms. The black rubber grips ensure a comfortable and firm hold, allowing for better control and accuracy. The pistol's 3.6" barrel, crafted from steel with a black finish, promises excellent accuracy and durability.
Operating on an SAO action, the TX22C provides a smooth and consistent trigger pull. The fixed front sight, combined with the adjustable rear sight, guarantees quick target acquisition and precision. The polymer frame offers resilience against everyday wear and tear while keeping the pistol's weight to a mere 16.50 oz. This lightweight design makes the Taurus TX22C an ideal choice for those in need of a dependable sidearm for various shooting activities.
Taurus TX22C Specifications
Brand: Taurus
Category: Pistols
Model: TX22C
Caliber: .22 LR
Barrel Length: 3.60"
Grip Material: Black Rubber
Action: SAO
Overall Length: 6.70"
Hand: Right
Sights: Fixed Front, Adjustable Rear
Slide Material: Aluminum
Frame Material: Polymer
Safety: Manual
Weight: 16.50 oz.
Barrel Material: Steel
Magazine Type: Single Stack
Grips: Black Rubber
Slide Finish: Black