Ghost Inc. Grip Plug Kit, Fits Glock Gen4 & Gen5 19, 17, 22, 23, 31, 32, 34, 35, 37, 38 & 45, (Does Not Fit SF Models), Black, 2-Pack GHO_GPG4X2 The Ghost Grip Plug is designed to keep dirt and debris out of the action of your Glock. It also serves as a magazine funnel to aid in reloading.