ST-22 Pistols are Available Complete with Dedicated .22LR Bolt and Barrel. Spike’s Tactical went with the Ciener design to Avoid Using Proprietary Design Parts. The Bolts are Machined From Heat Treated 4140 Chromoly with a NP3 Nickel Teflon Finish.
These Dedicated 16″ 22LR M4 Uppers have Barrels that are CNC machined out of Chrome Moly Match Grade Air Gauged Lothar Walther Blanks with a Mil Spec Parkerized Finish. They have the Proper 1:16 Twist Rate for the 22LR Round.
The Option of either an Arms Room Lower or a Spike’s Tactical Lower both come with a Reciever End Cap that is Machined for a Quick Disconnect.
**Options Shown** If the Magpul AFG is chosen, it will be installed with an Ergo bolt-on rail (included in the price)