There are many parts and tools needed to complete an 80% lower. Although there can be some variation in the type of tools you need, there is one that is of utmost importance to have the best result every time: the 80% lower jig. But what is this tool, and how can it help you get the best results?
Think of the 80% lower jig as a template tool. Its main purpose is to guide the builder, giving proper measurements of drill bit holes, and where exactly the milling needs to be done.
They come in many different varieties. Try to stick with multi-use jigs, as they provide longer usability. If a piece has outlived its usefulness, then you can order another of that same plate singularly. There are sticker variations which are meant to stick on to your incomplete receiver.
Jig variations that hook on and give more clear also have features that prevent builders from milling too deep, reducing the risk of permanent damage to the receiver itself. When it comes to milling out the mass of metal on the inside of the receiver, jigs are the best at decreasing the risk of damage.
The 80% lower jig is the most vital part of an AR build. And the best 80% lower jig kits come from Thunder Tactical! Our jigs come in 7075 T-6 airplane aluminum and are guaranteed long lasting results.
Each Jig comes with its own set of instructions to follow as well so our customers have an extra edge in creating their dream AR 80 lower. Akso, don’t forget about our jig fixtures which will hold the jig to the receiver giving a 3D outline of where you need to mill
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.
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!
As the AR world continues to evolve, stone age specs like the standard iron sight have become relatively extinct. New innovations have given way to more technologically advanced rifle sights. Even with more advanced optics though, having a back-up iron sight can make all the difference.
Back Up Iron Sights
Back up Iron Sights (BUIS) are a great way to ensure you always have a sight on your AR. If a bit redundant, BUIS provides a helping hand, as more tech-advanced sights require batteries or are less durable.
Iron Sights can be made in steel or aluminum. Steel is more durable and long-lasting, but adds extra weight. Aluminum does not have as much durability, but is much lighter than steel.
Polymer is also a viable option. However, finding a reliable polymer rifle sight is more difficult than its metal counterpart.
Height Differences Matter
The height of your sights matter. There are two different height types for rifle sights.
Same-Plane- The front and rear sights on a Same-Plane sight are the same height. That means on whichever rail the sight is placed, the front sight must be at the same height.
Gas Block- The front sight is about 1/4″ higher than the rear sight. However, these are only meant for circumstances where the gas block is lower than the upper receiver.
Fixed or Folding Sight?
The choice between a fixed or folding sight makes all the difference. Here are the main reasons people choose either fixed or folding rifle sights.
Fixed Sights- Fixed sights are generally more solid depending on the material. They are designed for primary use, and do not fold in any way. This also means that you don’t need to worry about the sight moving. Just Set it and forget it.
Folding Sights- These sights are meant as secondary assets. If a primary rifle sight runs out of battery, or another sight is in use, then this folding sight can be positioned up or down.
They do lack in durability, simply because more moving parts yield higher margin of error. the hinge may become loose with time, creating less accurate shots.
Fixed sights are usually more dependable in the long run, but folding sights provide an extra asset. The general rule of thumb is that Fixed sights are for primary use, and folding sights are for secondary use.
Now that you know what to look for when purchasing new optics, Visit Thunder Tactical to get the best quality rifle sights!