Mine has the rechargeable battery rather than the AA batteries. I tried a AA battery in this part - very loose.
How do you open it? I already broke a fingernail. Haven't used it yet. It is the newest model with the included charger. Just Curious.
Hey JB486 - mine also has the GCU 2.0 electronics. I’ll check the build date info out. I also sent a pic of the mysterious item to AoA for an ID.
Try putting the rechargeable battery in it. Maybe it's a spare battery holder or for folks uneasy about storing or shipping the gun while the battery is still connected to that circuit board IDK mine doesn't have it for me to try it for myself for fitment.