May, 21

AR 15 Upper Build Kit: The Ultimate Guide for DIY Enthusiasts

Featured in:

Are you a gun enthusiast who likes to build and customize your own firearms? If so, then you're probably familiar with the AR 15 platform. The AR 15 is one of the most popular rifles in the United States, known for its versatility and ability to be customized.

One way to customize your AR 15 is by building your own upper receiver. To do this, you'll need an AR 15 upper build kit. But what exactly is an AR 15 upper build kit? Simply put, it's a package that includes all the necessary parts for assembling the upper receiver of an AR 15 rifle.

In this article, we'll dive deeper into what makes up an AR 15 upper build kit and why they are useful for gun enthusiasts. We'll also discuss some tips on how to choose the right one for your needs and some common mistakes beginners make when building their first custom rifle. So if you're interested in learning more about this exciting aspect of customization, read on!

AR 15 Upper Build Kit: Everything You Need to Know

The AR 15 is one of the most popular firearms in the United States, and for good reason. It's reliable, versatile, and customizable. And when it comes to customizing your AR 15, nothing beats building your own upper receiver.

In this article, we'll discuss everything you need to know about an AR 15 upper build kit – what it is, how it works, and why you might want one.

What Is an AR 15 Upper Build Kit?

An AR-15 upper build kit is a collection of parts that allow you to assemble the top half of your rifle from scratch. This includes everything above the lower receiver – such as the barrel assembly, handguard assembly along with all other components including dust cover etc..

The kit usually includes a stripped or partially assembled upper receiver (the housing for all those parts), bolt carrier group (which houses firing pin), charging handle (which allows user to cycle rounds into gun) , gas block( essential component which determines how much gas passes through tube)and muzzle device(anything attached at front end). Most kits also come with all necessary tools needed,such as wrenches,punches etc..

Why Would You Want an Upper Build Kit?

There are several reasons why someone would want to use an upper build kit rather than buying a pre-made rifle or even just replacing some individual parts:

  1. Cost – Building your own rifle can be more cost-effective than buying one off-the-shelf because you have control over every part that goes into it.

  2. Customization – By choosing each individual component in your build,you get complete control over look(feel) thus making each gun unique.You can choose between different barrel lengths,target crown profiles,twist rate specificities,muzzle devices etc..

  3. Satisfaction – There's something satisfying about building a rifle from scratch and knowing that every part is exactly what you want it to be.

How Do You Build an AR 15 Upper?

Building your own upper receiver can seem daunting at first, but with the right tools and instructions, anyone can do it. Here's a basic step-by-step guide:

  1. Gather Your Tools: In addition to your AR 15 upper build kit,you will need some specialized tools like torque wrenches,pin punches etc.. This ensures all parts are installed correctly.

  2. Prepare the Receiver: Start by making sure you have all of the parts for your stripped (or partially assembled) receiver kit laid out in front of you.

  3. Assemble Bolt Carrier Group: It consists of bolt carrier itself,firing pin,gas key,bolt assembly along with any springs or pins needed.This is one of important component which needs close attention while assembling.

  4. Attach Barrel Assembly: Before attaching barrel assembly onto receiver,it's important to take care whether gas tube fits into proper hole on barrel nut.Also,tighten flash hider/muzzle brake onto end properly using adequate amount of wrench force

5.Install Handguard Assembly: Choose between existing handguard/rail options in market or make custom ones as per preference.Accordingly install them carefully ensuring no damage occurs during installation process!

6Install Remaining Components : All other components such as charging handle,dust cover,magazine release button etc should be added without fail.Thereby completing final specifications mentioned in user manual provided along with kit


An AR-15 upper build kit is an excellent way to customize and enhance your rifle-building experience.The ability to modify almost every aspect including weight,recoil profile makes this option attractive.With some patience,a bit effort ,good set of tools & guidance from manufacturers,anyone could assemble their own complete ar-15 platform firearm without any expert help!


What is an AR 15 Upper Build Kit?

An AR 15 upper build kit is a collection of parts needed to assemble the upper receiver portion of an AR-15 rifle. The upper build kit includes components such as the barrel, handguard, gas system, bolt carrier group (BCG), charging handle and other assorted parts necessary to complete the assembly. These kits usually come with all required hardware and instructions for installation.

AR-15 owners often choose to buy or build their own custom uppers because they can be tailored for specific functions such as long-range precision shooting or close-quarters combat. Building your own upper allows greater freedom in choosing individual components which can result in better performance.

How Difficult Is It To Assemble An AR 15 Upper Build Kit?

Assembling an AR-15 upper from a kit requires some technical skill but is not overly difficult with proper instruction and guidance. Most DIY builders consider it one of the easier aspects of building an entire rifle since most tools required are basic household items like screwdrivers and pliers.

However, if you are not familiar with gun assembly principles or lack mechanical aptitude then this may pose as a challenge and could even lead to safety hazards when attempting installation without proper knowledge on how each piece works together.

Do You Need Any Special Tools To Assemble An Upper Receiver For Your Ar 15 Rifle?

There are some specialized tools that will make assembly easier but most tasks can be completed using common household tools like pliers, torque wrenches (in/lb & ft/lb) , rubber mallets etc..

However there are few essential speciality tool that make assembling faster: Armorers wrench – used for removing/installing barrels/flash hiders/muzzle devices; Torque Wrench – used for properly securing barrel nut/gas block screws/mounted optic rings

Can You Customize Your Own Ar 1Upper Build Kits?

Yes, one of the main advantages of building your own AR-15 upper is that you can customize it to meet your specific needs and preferences. You can choose from a wide range of barrel lengths, gas systems, handguards or rails as well as optics mounts.

AR-15 uppers come in a variety of calibers and configurations such as .223/5.56mm/.300 blackout/.308 win etc. so you can select what best suits your application; for instance if hunting small game then 5.56mm would be most ideal while going after larger prey requires something with more stopping power like .308 win.

How Much Does It Cost To Build An AR-15 Upper?

The cost to build an AR 15 upper varies based on components selected but generally expect to spend between $400-$1000 for a complete kit with all necessary parts included depending on quality level desired.

Higher-end kits will include premium parts such as match-grade barrels or billet receivers while lower-end kits will consist primarily of standard mil-spec components which are more affordable but may not provide the same level precision performance at longer ranges compared to high-quality alternatives.

When considering cost, it's important not only think about initial outlay -you'll also want ensure proper tools/equipment are available before embarking upon any DIY project so budget accordingly!

Latest articles

Related articles

AR-15 Blueprints: The Ultimate Guide for Gun Enthusiasts

AR-15 Blueprints - these two words might not mean much to an average person, but to a...

US Army Cyber Command Jobs: Your Gateway to a...

US Army Cyber Command Jobs - these four words may seem like a simple phrase, but they...

US Army Education Services: Empowering Soldiers through Educational Opportunities

Education services US army is a broad topic that covers various aspects of education offered by the...

California Legal AR 15 2022: Everything You Need to...

California legal AR 15 2022 is a topic that has been on the minds of many gun...

AR-15 Jamming: Causes, Fixes and Prevention Tips

AR-15 jamming is a common issue that firearm enthusiasts and military personnel encounter. It can be frustrating,...

AR Core 15: The Ultimate Guide to AR-15 Rifles

AR Core 15 is a term that you may have heard recently in the military and weapons...