What are you going to grab?
The phone. Then one of my long arms, most likely a shotgun. But which one of my considerable choices doesn't really matter. I normally have a couple shotguns, and rifles ready to rock at any given time.
Remember per the OP, someone "is kicking the door in". I do not have to go to investigate, I already know what is happening. I have no gain to go find out "how many".
Call the Cavalry, grab a fighting weapon (THEY ALL have shoulder stocks on them). Wait for the BG's on the ground of my choosing prepared by me, while awaiting the Cavalry.
I have extensive combat experience, and am not stupid enough to go looking for a fight. I have my prepared position, that if the BG's get near me they will be on MY KILLING GROUND, where I want THEM, the WAY I want them.
What kind of genius would choose to fight any other way? Unless they are looking for Darwin recipient of the year awards.
Fight with your head, not your balls.
Go figure
Fred