I'm a bit of a newbie so would appreciate some advice. I own an AA S400 and only use it for target shooting (no hunting) but may in the future want to enter the odd competition. I own an AGS 3-9x50 scope at the moment (no parallax adjustment) but recently used the same gun with a MTC Viper 4-16x50 fitted. Even at my inexperienced level I appreciated the difference in terms of clarity but the MTC costs double what I paid for the AGS. The question is: should I stick with the AGS as its appropriate for the type of shooting I do or invest in a scope such as the Viper with parallax adjustment? What other benefits would the Viper bring over my AGS scope? Your views / comments / opinions would be most welcome.