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3 Things To Consider When Completing An 80% AR Lower Receiver

Posted by Arthur Adler on May 12th 2023

AR building has come a long way. There are many different strategies to complete an 80 AR lower receiver. For beginners, knowing the right tools to use, what materials are best, and the plan to complete makes all the difference. Here are 3 very important things to consider when completing an AR 80 Receiver.

The Right Tools

A jig and a jig kit are the most necessary tools to complete an AR 80 receiver. They help with holding the receiver in place, and display the exact points to drill in order to create the control fire group. Many tools can be used to complete it from hand drills to CNC machines. Make sure you have the correct bits for your receiver.

Types Of Material

There are two types of materials that AR 80 receivers can be made from. Different materials affect build strategy and longevity so it is very important to know what you want and why. AR’s are made in aluminum and polymer. Aluminum ARs can come billet, forged, or cast. Here are the specs on each type of lower.

Billet – These are the most common and middle tier receivers. A billet lower has a moderate difficulty on build time and are not overly expensive. It is also very easy to find a reliable manufacturer .

Forged – Forged lowers are the most high-end receivers out there. They are mil-spec, meaning these are “military grade” receivers. They are relatively more difficult to complete, requiring much more technical skill, and are heavier. They do provide a more unique with a more rustic tone. Manufacturers of forged lowers are also very reliable.

Cast – Choosing cast is not the most popular option, due to the process of casting itself. If the mold can produce air holes, they can form into pressure cracks that damage the integrity of the rifle. It is also important to say that cast lowers are not always bad, but the reliability of the manufacturers is far and few between.

Polymer – These are the easiest to complete because of the softness of the material. However, its softness also means that it is not the best AR 80 receiver to buy and keep as a long term investment.

Plan Ahead

AR 80 receiver completion is typically done in phases. This helps keep parts, bits, and tasks organized. The 3 basic phases are milling, installation, and assembly. Keep every tool, bit, and part organized to ensure a smooth build.

Visit our article on how to build an AR 80 lower as well!

Building an AR is a fun experience, and here at Thunder Tactical, we can make that experience great one! Visit our website today to see the best jig kits, parts, and accessories to build and customize the perfect AR!