Another long time favorite, the PK-A is a sturdy
and robust red dot tube optic. Originally appearing to
be an adaptation of the original PSO SVD optic, the
PK-A has a similar construction and the same style of
hammer grey finish.
PK-A comes in three types including a black
colored AK mount version, a black Weaver version and
the original grey universal mount version. While the
original appears to have an SVD mount it is actually a
universal type mount and will fit most AK's just fine.
The newer black versions use different style turrets
for windage and elevation and appear to be POSP
turrets, vs the original which are much smaller and
not marked with numbers.
PK-A uses CR357 watch batteries, but the battery
compartment on the original appears to have been
designed to use the same battery as the PSO-1 optic
and seems to require an insert for CR357's to fit.
PK-A weighs 15.3 oz and sits off to the left somewhat.
PKA original on the AK103 / SGL21
.
Original PK-A, not to be confused with the very new
Venezuelan PK-A
CR357 batteries appear to require a rubber insert
for them to fit properly. 
Reticule view down the tube. While pictures tend to
make the scope body larger than when using both eyes,
PK-A does have a tubular effect due to it's
construction.
Weaver version
PK-A with MTK83 AK mount, courtesy of Nictra. This
version sits taller than the universal mount grey
version and also has the same style turrets as the
Weaver version shown above, though the
on/off/brightness is in the usual place for a PSO or
POSP
PK-A AK mount with MVD forces
In Armenian service, courtesy of Miglan-20
What appears to be PKA Original in the
Ukrainian-Russian conflict
This guy is famous for his PK-A falling off during the
video but a properly tensioned optic will
never do that
PKA Weaver in the Ukraine
This is one of the oldest Russian red dot sights on the market but despite it's age it's a handy little optic that I've gotten excellent performance out of. Unlike many of the newer red dot sights PK-A is actually in service with several countries and special forces units as shown above.
