I picked up a PK 23 scope from Eastwave last year to mount on my SGL-31, which I also got last year. Took out for a test run today (only second or third time I've used it), here are my initial impressions
––-It has a flickering red dot––-it works fine, no complaints, don't see a significant advantage over the steady dot––-the PK 23 produces a halo when the setting is on bright, which doesn't bother me (similar to Eotech halo)––-there are 10 settings from very low to very high
––-Batteries are fairly expensive and can't be found at every store––-accidentally left the scope on the lowest setting when I first got it (didn't know about the on-off switch on the front of the battery case), which drained the first set of batts real fast––-we'll see how long the new set of batts last (Energizer A76 - these are 1.5V, but Duracell 1.55V 303/357 batts also seem to work fine)
––-It seems to be robustly made, but time and hard use will tell
––-All the markings are in Russian, and the instructions are minimal
––-Hate the lens covers––-take way too long to take off and put on, definitely not designed for quick action, and I'm sure I'd lose them within a week in the field––-anyone have ideas for flip-up lens covers?
––-The side mount was super wobbly when I got it, but still managed to get it sighted in, seemed to shoot fine at close range––-finally figured out how to tighten it (thanks to a tacked thread in this forum), now it's super solid, no wiggle at all––-the side mount is fairly easy to install and remove, but it digs into my chest when I have the rifle slung on my chest (using old Viking Tactics sling), pretty uncomfortable––-scope seems to hold its zero when removed and remounted
––-The scope obscures the sight picture a bit, but can still co-witness with the stock irons, which is nice
––-My groups seem to be about as tight whether using irons or the PK, but I can acquire a target MUCH faster with the PK vs. irons, no contest––-this is the main reason I'll be keeping the scope, plus easier target acquisition in low light conditions
––-I'm worried about the lenses being scratched, they seem to get dusty fairly easily––-with regular field use I think I'd be wiping them off with my t-shirt a lot, which would lead to scratches, especially considering the crappy lens covers
Overall I think this scope is probably worth the money (~$200 shipped I think), but time will tell. My main concern is how long the batteries will last.
The SGL-31 is a sweet little shooter by the way. Zero stoppages so far (300 rds of Russian mil-surp), smooth trigger, minimal muzzle rise so follow up shots are fast, real nice build, everything is tight. Very happy with it.
I'll post a pic when I can find my digital cam.