June, 14

AR-15 A2 Upper: The Complete Guide to Upgrading Your Rifle

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AR 15 A2 Upper is a popular and sought-after item for gun enthusiasts. It is a firearm upper receiver that has been designed to fit the AR-15 rifle platform, which has become increasingly popular over the years due to its versatility and customization options. The upper receiver houses the barrel, bolt carrier group, charging handle, among other essential components of an AR-15 rifle.

The AR 15 A2 Upper offers several advantages that make it stand out in this highly competitive market. For one thing, it is made of high-quality materials such as aluminum alloy or steel and undergoes rigorous testing to ensure durability and reliability. It also comes with various features such as Picatinny rails for easy attachment of optics accessories like scopes or red dots.

If you're looking for detailed information on what makes the AR 15 A2 Upper so special and how you can take advantage of its features when using your firearm – look no further! In this article we'll dive deep into everything you need to know about this impressive piece of equipment. Read on!

AR 15 A2 Upper: What Makes it a Must-Have for Your Rifle?


The AR-15 is a popular rifle platform that has been used by military personnel, law enforcement agencies, and civilians for decades. The versatility of this rifle is unmatched, making it an ideal choice for hunting, target shooting or self-defense. One of the key components of the AR-15 rifle is its upper receiver assembly.

In this article, we will take an in-depth look at the AR 15 A2 upper and what makes it a must-have component to your rifle. We will explore its features such as materials used in construction and its benefits over other types of uppers.

What Is An AR 15 Upper Receiver Assembly?

Before we delve deeper into what makes the A2 model special let us first understand what exactly an upper receiver assembly means concerning rifles such as the Ar-15.

The upper receiver assembly comprises several parts that include; barrel nut thread relief cuts (where applicable), handguard cap provisions (again where applicable), forward assist provision on some models but not all plus many others which vary from manufacturer to manufacturer.

The main function of these components is to contain and guide ammunition through firing cycle efficiently while providing stability during use thereby increasing accuracy.

Comparing Different Types Of Uppers

There are different kinds of uppers available today one can choose from when building their own custom ar-15 firearm or upgrading existing ones depending on preferences like desired weight limits or barrel lengths etcetera.
But among them all none come close to being comparable with regards efficiency than our primary focus here -the Ar 5A2 upper-

Some other types include:

  1. Flat-top receivers
    This type allows users greater flexibility in mounting optics since there isn't any fixed iron sight system obstructing view.
    They are lighter than most standard carry handle-based receivers hence provide more maneuverability especially when moving around in tight spaces. But a downside to their design is that they might not be as stable as more rigid types.

  2. A1 Uppers
    A1 uppers are the earliest form of upper receivers used on the Ar-15 rifles; these were first adopted by US military forces during Vietnam war era.
    Their primary benefit was cost-effectiveness, but since then they've been replaced by newer models like A2 uppers which provide better accuracy and reliability than initial designs.

Why AR 15 A2 Upper Is The Best For Your Rifle?

Now, let's take a closer look at what makes the AR 15 A2 upper receiver assembly so special compared to other types we've mentioned.

Materials Used In Construction

One significant aspect of this kind of upper is its construction material. It's made from high-quality aluminum alloy with specific heat treatment processes applied making it stronger and able to withstand high amounts of stress while maintaining structural integrity over time.

Another key advantage lies in its compatibility with most barrel lengths due to being designed with improved feed ramps plus chambering geometry promoting consistent performance regardless- shorter or longer barrels.

Benefits Over Other Types Of Uppers

Besides durable construction materials, there are other benefits associated with using an AR 5A2 receiver over any others available out there today:

  1. Improved Accuracy: thanks mainly due partly because rear-sight aperture is positioned slightly higher above bore axis than traditional M16-style iron sights increasing sight radius hence precision aiming ability when shooting targets at distance.

Also enhanced overall stability achieved via slick side design reducing unnecessary bulk without sacrificing critical functionality hence keeping weight down while simultaneously improving pointability & control during use

Tips When Shopping For The Right Upper Receiver Assembly

Here are some tips for you when shopping for an ideal top-end assembly that meets your requirements:

  • Check Compatibility: Always ensure whether particular kind works well together including barrels and accessories before purchasing anything
  • Check The Design: Consider factors like weight, durability, accuracy potential among others that are most important for your intended use
  • Look For What's Included In Package: Some uppers come already equipped with essential component parts such as forward assists or dust covers etcetera while others might require additional purchases.


Whether upgrading an existing rifle or building one from scratch consider using the AR 15 A2 upper receiver assembly which is a must-have if you intend to take full advantage of all benefits associated with this platform.
When shopping around always ensure checking compatibility plus other factors we've discussed here when making decisions on what kind would best suit your needs.


What is an AR-15 A2 upper?

An AR-15 A2 upper is the top half of the rifle that houses the barrel, bolt carrier group, and other essential components. It is designed to work with an AR-15 lower receiver to create a complete firearm. The A2 designation indicates that it has a fixed carry handle with adjustable iron sights instead of a removable handle like the A3 or A4 models. This makes it popular among traditionalists who prefer classic military-style rifles.

The upper receiver comes in two main styles: stripped and complete. Stripped uppers include only the necessary parts for assembly, while complete uppers come fully assembled and ready for use. One advantage of using a stripped upper is that it allows greater customization options since users can choose their own specific components rather than being limited by pre-assembled parts.

AR-15 enthusiasts often enjoy building their own firearms from scratch or upgrading existing ones, which explains why there are so many aftermarket options available for both stripped and complete uppers.

What materials are used in making an AR 15-A2 Upper?

AR-15 A2 uppers can be made from various materials such as aluminum alloys (6061-T6) or steel alloys (4140). Aluminum alloy receivers are most common due to their lightweight nature which helps reduce overall weight when compared to steel receivers while maintaining strength properties necessary for reliable function.

However, some manufacturers also offer high-end versions machined out of billet aluminum which provides greater accuracy potential due to its more precise manufacturing process.

In addition to material choice, special attention must be paid during machining processes such as drilling out holes needed in order create proper fitting threads between mating surfaces on separate pieces attached within an assembled firearm system like buffer tube assembly mounts onto rear portion above pistol grip area called "receiver extension" aka buffer tube threading location.

Can I build my own AR 15-A2 Upper at home?

Yes, you can build your own AR-15 A2 upper at home with the right tools, knowledge, and expertise. However, it is important to note that building your own firearm requires a certain level of skill and understanding of gunsmithing basics such as headspacing which involves making sure that the bolt mates perfectly with the barrel.

It is recommended that individuals interested in building their own AR-15 familiarize themselves with all applicable federal and state laws before beginning any DIY project.

One way to get started on this process would be to purchase a stripped upper receiver online or from a local gun store then acquire necessary components like barrel assembly (which should come pre-headspaced), gas block/tube assembly if using direct impingement operating system instead of piston-driven design system sometimes referred as "gas piston" type firearms) plus all other parts needed for complete build-out before adding final touches such as handguard options onto build.

What Accessories Can I Add To My AR 15-A2 Upper?

There are numerous accessories available for an AR-15 A2 upper ranging from basic iron sights to sophisticated optics systems. Some popular additions include forward grips or angled foregrips (AFG) which provide added stability when firing off-hand or prone positions respectively; lights mounted on rails along top portion near front sight post allowing low light shoots more easily without sacrificing accuracy; suppressors/silencers designed quiet muzzle blast sound signature while maintaining accuracy potential often appreciated by tactical shooters who desire suppressor use in training environments for safety benefits.

Other popular accessories include red dot sights which provide fast acquisition speed on targets up close while also maintaining accuracy potential out farther distances than traditional iron sights alone might allow due limited field-of-view limitations inherent within those types devices but still highly effective depending upon shooter preference needs/wants.

The key thing when shopping around for various accessory options will be finding what works best given individual shooter requirements including personal preferences, budget constraints, and desired level of versatility/multipurpose use purposes.

What are the differences between an AR-15 A2 Upper and Lower?

The main difference between an AR-15 A2 upper and lower is where they are located on the firearm. The upper receiver houses the barrel, bolt carrier group, charging handle, handguard/rail system (if applicable), while lower receiver houses most essential firing control components such as trigger assembly & magazine release button/lever.

Another significant difference is that the lower receiver contains a serial number which identifies it as a firearm according to federal regulations in US for those under jurisdiction of Bureau of Alcohol Tobacco Firearms & Explosives (ATF).

In addition to these differences, there are also variations in design details such as finish or coatings applied to each respective part. For example some uppers may be finished with black nitride coating whereas others could come coated with Cerakote paint for improved wear resistance potential against corrosion from elements like salt spray exposure during marine environments used by military units worldwide all year round.

Overall when considering building out your own custom AR-15 rifle or upgrading existing platform it's important take into account various options available within market today including both stripped vs complete uppers/lower combos along with accessory add-ons needed make gun fit user needs/wants perfectly!

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