here is a fun little video of the 3 basic (and i mean basic) choices for Home defense....
Pistol vs AR-15 vs Shotgun
IMHO AR-15 (caliber still debating on, but i kinda lean 300 black out) SBR or at least "pistol" hands down best option
Pistol vs AR-15 vs Shotgun
IMHO AR-15 (caliber still debating on, but i kinda lean 300 black out) SBR or at least "pistol" hands down best option