The grip plug helps to improve the balance and prevent debris buildup in the grip of your glock.With the weight increase in the lower portion of the frame, felt recoil is reduced making follow-up shots faster and more consistent.It is cnc-machined from aluminum with a hardcoat anodized finish.*note does not fit the glock 36/42/43 models.Firearm Type: HandgunFirearm Model: Glock 19 Gen3Material: AluminumFinish: Anodized