Complete uppers are helpful for those that are looking to swap to a new caliber on their AR-15 or AR-10 quickly. Own a 5.56NATO AR-15? Buy a .300 Blackout complete upper below and attach to your existing lower. Same with AR-10. Already have a .308 Win AR? Buy a 6.5 Creedmoor upper below and start blasting.

A complete upper is exactly as it sounds. Complete. That means it comes with the upper, barrel, muzzle device, handguard, and most times bolt carrier group.  There are many different calibers that allow for quick swap onto your existing AR-15/AR-10 lower. Check out all of our complete uppers below and start your next build or upgrade your existing AR.