WHERE CAN I BUY A GLOCK 30 ONLINE OPTIONS

I place a Tarran Tactical kit right into a gen 3 g23 and it's now Tremendous lite but I nevertheless couldn't strike something with it. My Pal could shoot it really well but I struggled. Finally I changed the stock sights to some Dawson Precision Preset Competition Sight Set and now I do very good with it.Probably a dumb query, but is the 30s as so