It attaches to the grip where the backs straps on the gen 4 would go. It's 25 bucks and seems like it may make the grip feel better. Do any of you know someone who uses this? Do you think it's a good idea? I don't have any experience with beaver tail grips.
Here it is Amazon.com: New Twin Pack Grip Force Gen 4 Glock BeaverTail Adapter 17, 19, 22, 23: Everything Else