How to Assemble a Lower Receiver

An AR-15 Rifle build should start with purchasing a lower because this is the part that is an FFL item and requires a background check like any other firearm. Building an AR lower can look a little bit intimidating for a first-timer. But, with a little preparation and some guides, it’s more than doable. Here, we’ll walk you through the process in brief. First, it’s important to have the right parts and tools for the whole build. From there, we’ll talk about the magazine and bolt catches, before moving onto the trigger assembly. Lastly, we’ll get it ready to meet with an upper by getting the grip and buffer assemblies good to go.