WHERE CAN I BUY A GLOCK 30 ONLINE OPTIONS

I set a Tarran Tactical kit right into a gen 3 g23 and It truly is now super lite but I even now couldn't hit anything at all with it. My friend could shoot it rather well but I struggled. At last I changed the inventory sights to some Dawson Precision Fixed Competitiveness Sight Set and now I do very good with it.Possibly a dumb question, but woul