BudsGunShop.com - is this a threaded barrel? as in suppressor ready?

Yes, it is threaded.

yes its threaded see ****Specifications and Features:
Henry Repeating Arms Frontier Model Threaded Barrel H001TSPR
Lever Action Rimfire Rifle
.22 Long Rifle, .22 Long and .22 Short.
10 Rounds .22 LR
**********24" Octagon Threaded Barrel
Threaded 1/2"x28 TPI
1:16 Twist
Shortened Tube Magazine for Easy Reloads with Suppressor
Adjustable Semi-Buckhorn Rear Sight with White Diamond Insert
Tall Bead - Suppressor Height - Front Sight
American Walnut Stock
Blued Finish
Length of Pull 14"
Overall Length 42.5"
Weight 7 Pounds
Made in the USA

James, yes, this is "SUPPRESSOR READY" Threaded Barrel that Includes the Thread Protector. [24" Octagon Threaded Barrel - Threaded 1/2"x28 TPI - 1:16 Twist].