CMOS,
I've owned one in .22lr for about 6 months now. With open sights, it seemed to shoot really well. So, I went and bought the cheapest scope I could find($9.96) and mounted it. After sighting it in with some cheap ammo, I ran some pricey Eley ammo thru it to see how the groups tightened up. At 25 yards I was making a single ragged hole with a 5 shot group with two different types of ammo. I was a little surprised when the target rolled back to me and I saw this type of accuracy with a inexpensive rifle like this. Taking it apart to clean it is easy enough, but putting the springs for the bolt back in can be a little tricky. I have had what I consider a slight problem with jamming and FTF's, but I think it's mostly the cheap ammo I have used. All in all, I really like the gun and would buy it again without a thought.
BB
NRA/GOA