Trigger Guard Undercuts are a great upgrade to any Glock pistol. The single undercut allows for your primary hand to get a higher grip on the pistol. This will make your grip more comfortable and also help to get a better bore axis. Add in the double undercut to gain a reference point for your support hand and get a better grip every time you draw your Glock. To order, purchase this service online and send us your frame with a copy of your invoice. Turn around time is 2-3 weeks from the date your frame is received. Applies to all model Glock handguns.