I just got done sighting in my PK-AS on my converted Saiga (5.56). Just so you know my perspective, I am a left handed shooter so my perspective is going to be different than a Right Handed shooter since the sight hangs off the left side of the weapon.
Gun Saiga (converted)
chamber 5.56x45
Optic PK-AS
Ammo Olympic 5.56 (62 grain NATO spec) and Wolf 5.56 (55 grain)
Weather Nice day, 70F degrees, no wind, dusk sun
Conditions Bench-Rest rifle range with sandbags
I bought my sight from
www.freedomoptics.com I want to say this because the gentleman who runs this site has excellent customer service and quality product. I am NOT affialited with him and I am not getting a discount (I wish I was) but my experience with him was great!!! This site has a good English translation of the PK-AS manual as the PK-AS comes with a manual in Russian only (complete with Stamps - if you have ever been to Russia or dealt with Russian official documents, you will know what I mean). I recommend going to the sight to get the English translation before you begin to sight in the PK-AS.
The PK AS is an intimidating looking sight. I was impressed just by the looks. It just looks great on an AK.
BUT
The PK-AS is a BEAR to sight in. I had to make 2 trips to the range to sight it in (because I forgot the English translation to the book) but we finally got it sighted in today. You have to make your shots, remove the sight, loosen the locking screw, make adjustments, tighen the locking screw, re-attach the sight, shoot again, repeat. This is extraordinarily teadeous and we were using a spotting scope so we didn't have to walk so much. The attachment clamp is not hard to operate but it is still a pain to have to remove the sight to make adjustments.
BUTOnce we had that PK-AS sighted in, I was able to hammer nails with it. We shot from the bench rest and were having great results. After this, I stood up from the bench and was taking shots at a 2 inch plate of steel (1 foot squared diameter painted red) at 100 yards and hit the target every single time. The adjustable red-dot is great because you can make adjustments to your preferences or for the background you are shooting at. I am a left-handed shooter and the over-hang of the sight to the left of the rifle gave me a great cheek-weld to the butt-stock. Target acqusition was very quick and I was able to see what I was shooting at a lot better than using the iron sights on the AK.
conclusionIf you own an AK, I recommend that you buy an optic for your rifle. For such a small investment, improves the rifle significantly. The PK-AS improved the rifle's accuracy and in my opinion, made the rifle a better weapon. I have shot an SAR-2 with a Kobra and I am not slamming the Kobra. It is a godo sight also. The PK-AS just looks good and shoots great. I own and shoot an AR-15 and I shot an M1A this evening after sighting in my Saiga today and I feel that you can get good accuracy from iron sights with these peep sights. With an AK using iron sights, I can't get such results. With a PK-AS optic, I can easily get this accuracy.
In the end, even though it was a pain to sight in, I say it was worth it. You don't need to sight in the PK-AS all the time so I am willing to forgive the pain-in-the-ass sighting in process. The results were worth it.