PO 3.5x21P is a modern
optic produced by BelOMO -- Belorusskoe
Optiko-Mechanichesckoye Obyedinenie (Belarus Optical
& Mechanical Enterprise) in Minsk, Belarus.
It is designed to be similar to the ACOG but with a
breath-takingly wide wide field of view that so
far no other Russian optic has matched.
Optical clarity is extremely high and in my opinion is one of the brightest and clearest optics I've used...the image quality is very impressive. It is also one of the easiest scopes to zero due to the reticule design. Like many Russian scopes, the PO 3.5 has a 1.5m range finder for estimating distance to a standard height target but uncommonly it also has a 0.5m scale for prone targets as well. The PO 3.5 has not been adopted by the Russian or Belarus armed forces. While this is probably the heaviest optic I've used at 2.2lbs (outside of the NSPU of course, 5lbs), the weight penalty is somewhat offset by the amazing field of view and the high glass quality.
The PO comes in a few versions - illuminated and non illuminated models as well as a variety of caliber specific types. Like many of the modern Russian and BelOMO designed optics PO 3.5 has no turrets to adjust for elevation or windage, the intent is to zero the weapon based on the 400m concept and then use the additional range chevrons for longer distances if necessary. There is no need to adjust anything when shooting, the rifleman only has to aim COM out to 400m and will have a reasonable chance to hit.
PO3.5x21P for Saiga 7.62x39, PO 3.5x21P for Saiga 5.45x39 and PO 3.5x21P2
The PO 3.5 is zeroed on the 400m
concept and is probably the easiest of all the 5.45
scopes because of the design of the reticule. Instead
of having to adjust point of impact to be
approximately 22cm higher than point of aim, the PO
has this distance built in to the reticule itself. All
the shooter needs to do is align POI with POA by using
the boresight cross at the top of the reticule. After
confirming that the boresight cross is indeed where
the rounds are landing at 100m, the shooter then uses
the large chevron for center of mass aiming out to
400m. There are additional range lines for 700, 800,
900 and 1000m.
PO 3.5x21P is battery illuminated like many of the older PSO style illuminated optics. (CR123 type)
Alternate reticule (courtesy Miglan-20)
On the SGL31
For 7.62x39 if point of impact
is 23cm higher than point of aim at 100m the
trajectory will coincide at 300m. This is the same
height of the boresight cross over the chevron at
100m, so if POA = POI with the boresight cross, using
the chevron will adjust for the proper 300m zero.
PO 3.5x21P from BelOMO showing the 7.62x39 trajectory in a French version of the manual:
PO 3.5x21P Datacard
50m = +11cm
100m = +23cm
150m = +29cm
200m = +28cm
250m = +18cm
300m = +0cm
350m = -33cm
400m = -79cm
42.8 ounces with NPZ mount, 34.4 without
2x AA batteries (Not CR123 like regular PO 3.5)
Elevation (arrows are reversed from PSO type optics):
ВВЕРХ = Counter clockwise = Trajectory Up
ВНИЗ = Clockwise = Trajectory Down