ST-22 Uppers are Available Complete with Dedicated .22LR Bolt and Charging Handle!!! We went with the Ciener design to Avoid Using Proprietary Design Parts. They are Machined From Heat Treated 4140 Chromoly with a NP3 Nickel Teflon Finish.
This Dedicated 5.5" 22LR Upper has a Barrel that is CNC machined out of a Chrome Moly Match Grade Air Gauged Green Mountain Blank with a Mil Spec Parkerized Finish. It has the Proper 1:16 Twist Rate for the 22LR Round.
NOTE: All NFA rules apply.
Upper Receiver Features
|Barrel Length (in)||5.5"|
|Rifling||1 in 16"|
|Additional Info||All NFA Rules Apply. Mounting this on a rifle lower will create a short barrel rifle. It is fine to use on a pistol lower.|