About The Upper Receiver of the AR-15
The immediate ancestor and civilian equivalent to the military M16 and M4 rifles is The AR-15. It is a tremendously popular weapon. Its tremendous flexibility and the virtually endless array of customization options it gives you is one of the reasons for its enduring popularity with civilian and government operators. When you're ready to start thinking of your AR-15 as a mix-and-match rifle combining the best parts from multiple manufacturers, you will need to spend plenty of time studying your terminology. Make sure to find the right AR-15 Complete Upper Receiver For Sale from one of our trusted vendors. Understanding the upper receiver, one of the rifle's most vital components, is especially important.
The Upper Receiver:
One half of the mechanical core of the AR-15 rifle is formed by the upper receiver. The upper receiver is responsible for most of the shooting, handling, and performance characteristics of the rifle, together with the lower receiver. Both receivers are connected securely by a two-pin system that allows for quick conversions while still maintaining outstanding stability and reliability.
The AR-15's upper receiver houses the bolt assembly and firing chamber of the rifle and mounts the rifle's barrel and this is why it has a lot to do with the overall shooting characteristics of the weapon. What makes it easy to transform the AR-15 almost entirely by merely swapping one upper receiver assembly with another he rifle’s modular nature.
Lower Receivers vs. Upper Receivers:
It's important that you don't confuse the upper and lower receivers when you're shopping and looking for assembly, maintenance, and modification directions, especially when you're very new to the world of AR-15s. It's very difficult to mistake one receiver from the other if you're looking at a picture or have a few words of description to go with.
The way to tell the difference between the two parts has less to do with their location and everything to do about what they connect with. The two receiver parts connect with each other. The lower receiver also connects to the grip, the stock and buffer tube, the trigger assembly, and the magazine. the barrel and the lower receiver is connected by the upper receiver.
An Important legal note: The AR-15's serial number is carried on the lower assembly. On the basis of a legal perspective, the lower assembly IS the rifle. It is not true of the upper receiver, and you don't need to have any special licenses or submit any personal information to purchase one.
Stripped Receivers vs. Receiver Assemblies
You need to understand two key pieces of upper receiver terminology before going any further: stripped upper receivers and upper receiver assemblies. If you buy each of these, they will give you significantly different collections of parts, so you don't want to get confused.
We can say about the stripped receiver that it is fairly self-explanatory. Without any of the parts that attach to it, it’s just the receiver itself and that’s the way to go if you're completing a fully customized AR-15 build.
What is a bit less fully defined is the upper receiver assembly. When talking about an assembly, some sellers are referring to a receiver with a dust cover and forward assist installed and others include the charging handle, hand guard, and even the barrel. The assembly sometimes includes everything except the barrel. Some of the assemblies come with a bolt and bolt carrier, but many do not. To make sure you're getting all of the parts you need review the contents of an assembly carefully before purchasing it or using it.
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