I have a fixed 4x BSA that I got for 17 bucks at Wal Mart on clearance... its on one of my 10/22 Liberty Training Rifles I loan out for Appleseed clinics. It works just fine... it has shot plenty of Expert scores on the 25m Army Qual. Test. I don't think I would try it on one of my 30 cals for fear of breaking it, but it works great for a rimfire.