I have two Barska Air Rifle Scopes. One is a 4X mildot, and the other is the 2X7X32 mildot. I bought them both from MidwayUSA. They both have been fine scopes. I have had no problem with shifting poi. The optics are clear, the AO is accurate, and the adjustment mechanism works properly in my scopes. I did have one that had the small phillips screw come loose that holds the finger adjusting mechanism for the elevation turrent. I tightened it with jewelers screwdriver and it has been fine ever since. For those looking for an inexpensive airgun rated scope, I would check out the Barska line. BTW I mount all my airgun scopes using B-Square Air Sport Rings and have had no slippage problems with them. Don't overtighten them as the cap screw heads can round out if over done.