June, 24

AR 15 Blanks: The Ultimate Guide to Building Your Own Custom Rifle

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AR 15 blanks are a popular topic among gun enthusiasts and hobbyists alike. To the uninitiated, it may seem strange to discuss metal blocks without any trigger mechanisms or stocks, but these blanks serve an important purpose in the firearms industry.

These blanks provide a foundation upon which gun owners can build their own custom AR 15 rifles. They allow for complete customization of every aspect of the rifle, from barrel length to grip style. Additionally, by building their own rifles using AR 15 blanks as a starting point, gun owners can save significant amounts of money compared to purchasing fully assembled rifles.

To learn more about AR 15 blanks and how they fit into the world of custom firearm building and ownership, continue reading below.

AR-15 Blanks: The Ultimate Guide

If you're looking to build your own custom AR-15 rifle, then an AR-15 blank is the perfect place to start. Also known as 80% lowers or receivers, these blanks are essentially unfinished parts that allow gun enthusiasts to build their dream rifles from scratch.

In this article, we'll cover everything you need to know about AR-15 blanks. From what they are and how they work, to their benefits and some useful tips for building your own rifle.

What are AR-15 Blanks?

AR-15 blanks are incomplete lower receivers for the popular semi-automatic assault rifle that can be used in almost any configuration. They typically come as a solid block of metal with pre-drilled holes where necessary which only requires drilling out certain areas such as trigger pocket and fire control group area in order properly assemble it into a functioning firearm.

These “80 percent” lower receivers have become increasingly popular among gun enthusiasts who want more control over their firearms by building them themselves – instead of relying completely on ready-made rifles from manufacturers.

How Do They Work?

An 80% lower receiver is considered unfinished because it hasn’t been machined or drilled out yet. This means there’s no serial number or other identifying marks on the part when purchased; all federal regulations apply but without paperwork required like background checks since this piece isn't yet considered "a firearm".

With just basic tools such as drills and jigs available online or locally at hardware stores (or even using DIY templates downloaded from online resources), builders can mill down these blocks until all necessary parts fit together correctly – creating one-of-a-kind custom-built weapons tailored specifically towards individual preferences.

Benefits of Using an AR-15 Blank

The primary benefit of using an 80% receiver lies in freedom during customization. Builders get greater flexibility when designing their rifles; including how much weight it should carry overall (light or heavy), what materials used for parts such as bolt catches, and even types of handguards that fit well with their preferred shooting style.

Another benefit lies in the ability to avoid FFL transfer fees and other associated costs when completing the build process. As long as a builder starts with an 80% lower receiver instead of a fully machined lower, they can avoid excessive paperwork and expenses usually required by dealerships.

Tips on Building Your Own AR-15

If you're planning on building your own AR-15 using an 80% lower receiver blank, here are some tips to keep in mind:


Getting started requires basic tools like drills, jigs/machining cutters depending upon which kit you purchase. All these tools are easily available online or at local hardware stores.

Research & Planning

It's important to do proper research about everything before starting – including choosing the right type of rifle for your needs (such as hunting vs tactical application). Plan out how you want every part customized so it all fits together correctly from start-to-finish without any hiccups later on down the road.

Precision is Key

When working with metal blanks like these precision is crucial; take time making sure everything lines up narrowly and stays on track during cutting/drilling processes!


In conclusion, if I had to recommend one way to become more familiarized with firearms while also gaining greater control over customization – it would be building one from scratch using an AR-15 blank. With benefits ranging from flexibility in weight/materials chosen all leading up towards tailored designs specific-towards individual preferences – there really isn't any better way than this method!


What are AR-15 blanks?

AR-15 blanks are the unfinished receivers of the popular semi-automatic rifle. They are called "blanks" because they do not yet have any holes or cavities drilled into them for parts such as the trigger group, magazine well, and bolt carrier group. The receiver is essentially a metal block with no functionality until it is completed by drilling holes in specific locations that allow for the attachment of various components. Once fully assembled, an AR-15 blank becomes a functional firearm.

Some gun enthusiasts prefer to purchase AR-15 blanks instead of complete receivers because it allows them to customize their rifles from scratch according to their desired specifications. This can include various colors and finishes as well as different caliber options beyond just 5.56/.223.

Are there any legal restrictions when buying an AR-15 blank?

The answer depends on your location and local laws regarding firearms ownership and manufacturing regulations in your area.
In most states within America, purchasing an unfinished receiver (blank) is entirely legal under federal law so long as you don't intend on selling or transferring this firearm without first completing all necessary requirements (such placing serial numbers). However some states may differ making sure you check out your state’s regulation before proceeding with purchase.
It's important to clarify that once you turn an incomplete receiver into a finished weapon ,it must comply with all local laws including barrel length/ caliber requirements etc.

It should be noted however that even though it may seem easy to manufacture weapons at home using these blanks – care must be taken since this process would require certain skills when finishing these guns safely without injury.

Do I need special tools for assembling my own upper/lower receiver?

To assemble guns from scratch successfully at home requires specialized skills along with proper tools & machinery – assembly includes attaching critical components like triggers groups/bolts/carriers which requires precise fitting procedures involving dimensions down-to-the-thousands-of-an-inch. So, the answer is Yes! You will need proper tools for completing your AR-15 blank into a functional firearm.

Some of the necessary tools that you will need to complete an AR-15 build include a drill press jig kit, table vise block (for receiver holding), torque wrenches (in inch-pounds and foot-pounds), punches and hammers, among others. The good news is that most of these can be purchased at reasonable prices online or in gun stores. It's important to purchase high-quality tools since working with low quality/ cheap ones may result in damaging your project beyond repair.

Is it legal to sell completed firearms made from AR-15 blanks?

Once you have completed your gun assembly using an AR-15 blank and turned it into a functional firearm – selling or transferring ownership would land under local state laws as if it was any other personally-owned firearm.
It’s important however that prior to attempting any sale ,the owner must first submit their serial number through ATF’s e-forms website which requires filling out specific documents unless they are licensed manufacturers.

To ensure compliance with federal regulations & avoid getting yourself involved in illegal activities – one should take care only after verifying all requirements related to selling guns within their respective states before contemplating on such actions.

Are there any advantages of building my own rifle using an AR- 15 blank instead of purchasing a ready-made weapon?

Building rifles from scratch using blanks provides several benefits over buying readymade weapons including:

  1. Customization: Building an upper/lower receiver from scratch allows for customization beyond what manufacturers offer as pre-built models – allowing users full control over components like barrels/handguards/magazines etc.
  2. Cost savings: Buying parts separately & then assembling them could save money compared when buying whole rifle sets . However this depends on individual choices regarding components used during production .
  3. Greater understanding: Assembling rifles by oneself helps understand the working of a firearm, the function of each part and how they work together to create a functional rifle. Once one has learnt all about their weapon – maintenance becomes much easier since users are familiar with components making it more convenient troubleshooting problems that may arise in future.
  4. Sense of accomplishment: Many gun enthusiasts derive pride in building from scratch rather than buying ready-made rifles as it showcases their effort/skills & allows for personalisation according to preferences.

It’s important however that beginners without any previous experience should take proper instruction before attempting such tasks or risk injuries caused by improper handling/use. It's also essential that you verify local regulations prior to engaging in any manufacturing related activities .

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