Wow, there is a great multitude of good scopes out there for .22s. It depends on what you're going to do with the gun. If you're just plinking at short range in good light, any number of 4x32 mm scopes will work. If you're hunting or shooting in low light, you can get a decent 3-9x40mm for around a hundred dollars. Just make sure your scope mounts are high enough on the larger objective lens to give you a smidgen of barrel clearance.