The PK-AS/ASV is an advanced, Russian-made reflex sight used in the Russian Military. It is a unique advanced scope as it is powered, but if the battery dies, the red dot becomes a black dot, allowing the wielder to still know where they are aiming if their sight loses power.
"Russian advanced Holographic Sight featuring a circle and dot reticule for fast sighting. Great for mid to close range engagements with an open sight picture."
270 Kills (US Assault rifles)
0.264 seconds (raise)
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The PKA-S is a weapon attachment featured in Battlefield 3. It is the Russian equivalent of the American Holographic Sight in that it provides minimal zoom and it has a dot-and-ring setup like the Holographic sight. Like all optics (minus those explicitly for the sniper rifle) it can be mounted on any primary weapon.
The PKA-S is set to appear in Battlefield 4. A hybrid variant can be seen with a adjustable zoom sight. It is used in the Siege of Shanghai gameplay trailer.