Here are six cheap and great ways to add to your Glocks performance. Is under 15 dollars. This is my favorite Glock add on for an instant increase in functionality. I hate how flat and square the factory slide release is. Even the grippy little ridges are rounded. It’s all around shit. Make sure if you plan on running some magazines through your Glock to get this add on. 20 minute install that’s under 15 bucks, come on? New Grip Force Gen 1 2 3 Glock BeaverTail Adapter. Custom Glock Slide Cover Plates.