Plain Jentra JP-3 Grip Slug Plug for Glock 30 GEN 1-2 by NDZ Performance Plain Jentra JP-3 Grip Plug for GLOCK 30 - GEN 1-2 ONLY Will NOT fit S SF or Gen 4 Fits flush, prevents snagging, debris from entering or reaching trigger assembly and firing pin Quick install using a tight friction fit Helps guide mag. into mag well.