Have a few house guns - my primary is an AR pistol with a light, red dot, and two mags clamped together. Right now its a pair of PMAG 20s loaded with premium defensive/hunting ammo - 55 grain Silvertips in one mag, 55 grain Hornady TAP in the other. If that won't do the job, I guess its on to M855 or M197.
Also have a shotgun, pistols, even a .22 rifle and a .30-30 available depending on the threat or the needs. But the AR is my primary gun because its the best for accuracy, its got a bright ass white light which may help negate from having to pull the trigger.