SAR 18#6
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Finally, 4th generation Glock models<br />
incorporated rectangular checkering<br />
throughout the grip surface, a<br />
smaller grip with back strap extensions,<br />
a reversible magazine release, and the<br />
slide/recoil spring assembly was updated<br />
to include a dual spring for all models.<br />
The new slide and guide rod assemblies<br />
are not back-compatible with<br />
earlier models.<br />
While these categories are useful,<br />
the details in some cases can muddy<br />
the waters. Several models of Glock<br />
firearms were made bearing the 3rd<br />
generation finger grooves but no associated<br />
accessory rail. Guns of this<br />
type are rare and typically described as<br />
transitional or “Generation 2.5.” For the<br />
collector or firearm examiner wishing<br />
to evaluate this firearm, it’s safe to say<br />
that guns of this type were produced in<br />
relatively low numbers and for a short<br />
period of time. The early versions of the<br />
subcompact Glock 26 and 27 pistols<br />
(9mm and .40 S&W) produced around<br />
the same time had finger grooves on<br />
the front strap of the pistol that were<br />
devoid of checkering that eventually<br />
Above: From the first generation to the<br />
fourth, Glock models have undergone subtle<br />
changes to the markings and textures<br />
replicated in the molded polymer frames.<br />
appeared on later 3rd generation versions<br />
of those models. The slightly<br />
larger subcompact models 29 and<br />
30 (10mm and .45 ACP) were always<br />
made with the checkered finger<br />
grooves but eventually produced with<br />
the previously omitted accessory rail.<br />
The earlier non-railed versions of the<br />
www.smallarmsreview.com 51 <strong>SAR</strong> Vol. 18, No. 6
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