Building an AR-15 for Home Defense
Red dot vs LPVO, barrel length, lights, and how to set up an AR-15 for home defense — real build advice from the community.
The Quick Take
For a home-defense AR, keep it simple and reliable: a quality 16" (or shorter, if you go the SBR/pistol route legally) carbine, a dependable red dot, a weapon light, and a sling. Inside a home you're dealing with feet, not yards, so a red dot's speed beats an LPVO's magnification — save the LPVO for a rifle that also pulls range or daytime duty.
A few essentials people skip: a light is mandatory (you must identify your target), a sling keeps the rifle controllable, and you should zero it and confirm your defensive ammo runs reliably. Hearing protection and the over-penetration realities of 5.56 indoors are worth understanding too. The community answers below cover optics, barrel length, and ammo choices for the role.
