Good morning one and all . I acquired a G20 Gen 4 from another forum member . It is stock . My uses for it will be as a back up pistol , and maybe hunting if the shot presents itself within my limitations . Looking forward advice , and I once talked to SAWMAN about it for about a 1/2 hour during a meet up a few yrs ago . . Great advice ,but can’t remember all the details . My questions are : Stay with the stock barrel/ springs/ trigger , or invest in a 6 inch barrel ( either Glock or KKM , etc ) , and change springs / etc . I have a fair amount of ammo already so practice is paramount I know. I welcome any and all suggestions . Thank you .