SAR 18#6
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Spikes Tactical .22 ST-22 Upper<br />
Receiver Conversion<br />
In 2008, Spikes Tactical introduced<br />
their .22 Long Rifle conversion kit as<br />
well as complete rifles called the ST-22.<br />
These are amongst the highest quality<br />
of those tested. It should be noted that<br />
as of this time, Spikes Tactical has discontinued<br />
production of the ST-22 series<br />
due to the high demand of their 5.56mm<br />
and .300 Blackout rifles. There is a good<br />
chance once things calm down with the<br />
demand for the larger caliber, Spikes<br />
Tactical will bring back the ST-22 line.<br />
Spikes Tactical has offered nearly 50<br />
variations of their ST-22. That is every<br />
combination of handguard, lower receiver,<br />
gas block, barrel length and muzzle<br />
device you can think of including some<br />
different markings on the receivers.<br />
The receiver sent for test and evaluation<br />
came with a Mil-Spec 7075-T6 aircraft<br />
aluminum upper receiver. It has a<br />
Close views of the features<br />
offered by Spikes<br />
Tactical on their .22LR conversion<br />
upper. Notice the<br />
marked receiver stating the receiver<br />
is ST-22, .22LR caliber.<br />
Shown top right is a close view of<br />
the Spikes Tactical Dynacomp. The<br />
bolt is similar to that of the CMMG<br />
where the feeding mechanism<br />
is contained in the end<br />
of the bolt group instead of<br />
the feed ramps being attached<br />
to the end ofthe<br />
barrel. Also notice the<br />
bolt group is nickel<br />
boron coated.<br />
<strong>SAR</strong> Vol. 18, No. 6 68 Nov., Dec. 2014
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