WHAT IS A COMPLETE AR-15 UPPER RECEIVER?

Complete AR-15 upper receivers are pre-built upper receivers that are ready to slap on a finished AR-15 80% lower and start shooting right out of the box! Whether it’s in .223 Remington, 5.56 NATO, or .300 BLACKOUT, this is a turnkey solution to finishing out your build. A complete upper receiver is made up of the upper receiver, a hand-guard or rail, dust cover, barrel, a flash hider, bolt-carrier group, and a charging handle.

ar 15 complete upper | ar-15 complete upper | ar 15 complete upper for Sale

If you’d rather purchase your upper with all the components included, with us, you can get the best ar 15 complete upper receiver assemblies as the best option. These assemblies come ready to be taken out of the box and mated with a complete lower receiver to form a complete rifle. Lots of owners will have several complete upper receivers, some with different length barrels, different calibers, or particular features, and have just one lower that accepts them all.

WHY BUY A COMPLETE AR-15 UPPER RECEIVER?

These are convenient options for those who don’t have the knowledge or tools to assemble these components on their own, or for those who don’t have the time or desire to do it themselves. Nothing wrong with that! When building an AR-15 it is extremely important you know what you are doing to ensure your firearm will work normally and not experience any catastrophic failures, and the majority of people tend to buy complete upper receivers or the best ar 15 complete upper receiver from our shop for their first couple rifles.

How do you build an AR-15 Upper Receiver?

The AR-15 is a rifle comprised of two halves; the upper and lower mated together, each responsible for their own essential functions. While the lower is the half of the rifle that’s considered the firearm, and therefore gets a lot of attention, the components that most largely determine the performance of the rifle reside with the ar 15 complete upper.

ar-15 complete upper | ar-15 complete upper blemished

The upper contains the bolt carrier group, and is the half of the AR-15 the barrel attaches to, so making the right selection of upper parts to match your desired performance is critical.