Find popular AR receivers from brands including Yankee Hill Machine, Bushmaster, Aero Precision, Spikes Tactical, Bravo Company Manufacturing (BCM), Anderson Manufacturing, Patriot Ordnance Factory (POF), and more. Uppers ship directly to your home or business, while lowers will go to your local FFL for pickup.
The upper receiver houses the bolt carrier group and charging handle. You can legally purchase both complete and incomplete upper receivers.
The incomplete option being bare bones, and not including components like the bolt carrier group and charging handle.
Some complete upper receivers include a barrel, muzzle device, handguard, and potentially more in addition to your bolt carrier group and charging handle.
The lower receiver is a serialized frame that houses the firing control unit. Lower receivers are available to purchase in both complete and incomplete form.
A complete lower receiver may include a trigger, safety assembly, magazine assembly, and sometimes a grip, stock, and buffer tube.