Went to the range today to sight in my scope. After my first shot, the trigger locked up! I checked that safety, racked the bullet out and a new one in and nothing. I go to turn the gun over and the trigger group falls out! This is only the second time I have shot the rifle. So, maybe the trigger group wasn't properly seated. So I reinstall and snap it in as per the owners manual. I get two more rounds down range and again, the trigger malfunctions. The trigger group again falls free. WTF?