I'll bet the homeowners ears are still ringing.
Bottom line is though BG is dead, homeowner + GF are OK. AR-15 saved the day.
If all I had was a rifle or a carbine, I'd stand back from the entrance a good ways and have my girlfriend open the door
My dad did that to me once...except the intruder was a woodchuck that ran into our garage. To this day I would have rather been the one with the gun than the one opening the garage door...