Which mods will disqualify my gun from stock? All the grip work or just some of it? I really want to get rid of the grooves and undercut the trigger guard. Is grip tape like Talon legal?
In IDPA, any external modification not offered by the factory will bump you out of SSP. Grip tape is OK, because it's not a permanent mod. Items such as Glock extended slide stops and mag release are OK because they're available from the factory. A Vickers slide stop would not. Any grip plug that extends below the bottom of the grip is ESP only. Any trigger replacement that is different externally, such as those with aluminum trigger bows are ESP only. Any non-factory type guide rod such as steel one picece are ESP only. Any external frame mods are ESP only (hence my Accurate Iron internal magwell blend).
Things like match barrels and adjustable sights are OK, because they're considered accuracy enhancements. Same for internal trigger work. All factory safeties must remain intact though.