Find a complete breakdown of AR upper parts below split into easy to navigate categories. The biggest brands and the largest selection around. When building your next firearm, you’ll arrive to the upper parts and may get overwhelmed with the overall number of parts that make up the upper assembly as well as the different options available to you.

From the barrel itself to the charging handle, handguards, gas blocks, muzzle devices, complete uppers and everything in between. Click-Click-Boom has you covered with all of the biggest brands as well as parts for those on a budget.

The upper receiver parts we have are the best we can find, because we know ARs, and that means we know the importance of quality. All of our AR upper parts and accessories have been selected with quality in mind, so when you shop with us, you can do so with confidence. Check out our upper receiver parts for sale and invest today!