DD,
Still have a 5mm Blue Streak that preceded the FWB 124....

SG,
A good quality break-barrel spring piston pushing quality pellets will put a smile on your face. Be sure to post pixels of same. Good glass will add to your enjoyment. As Andy indicated, only scopes designated for air rifles due to vibration/recoil. Because targets are usually close, I'd add that one with parallax adjustment is best. If your peepers are good, an aperture/peep sight doubles the sight radius of the standard irons and will serve most purposes if you don't want to go for a scope to start. Spring piston rifles take some time to smooth out and settle in. Like fine wine and women, they improve with time....