The Ruger SR22 threaded barrel kit contains a factory-manufactured stainless steel barrel for optimal fit and function. It accepts any 1/2"-28 (Class 2A) muzzle device and includes a barrel cap, adapter and wrench. This Genuine Ruger Factory Accessory is compatible with Ruger SR22 pistols bearing serial numbers 361-7XXXX and higher. Does not fit the 4.5" length barrel model. Made in the USA.
Specifications:

Caliber or Gauge	22 Long Rifle (LR)
Length	3.5"
Model	SR22
Twist
Sights	None
Bore Type
Finish	Stainless
Type	Handgun
Chokes Included
Choke Configuration
Barrel Type	Threaded
Ammo Type
Barrel Features	1/2"-28 tpi