I've got a Theoben MFR .20 that I use for regular practice on an 18 acre small holding, and have had the displeasure of using a MTC Optics Viper 4-16 on it. The glass is ok, but it's SFP, Mil Reticle and MOA turrets is a pita, which seems to be the norm for air rifle scopes. The closest 'cheap'...