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Our New Premium Billet Lower Receiver is our Best Yet

Innovation is long what has driven the AR 15 community. It is has kept the M16 and M4 series of ARs relevant for generations of warfighters. Rarely can a grandfather and grandson discuss using the same service rifle in different wars. Innovation is what brought us the entire concept of 80 lower receivers, and through innovation, we have come to our new premium billet 80 lower. 

So, What is the Premium Billet 80 Lower Receiver? 

The new premium billet 80 lower is taking a new approach to billet lower receiver design. It retains some of our favorite features, like the engraved fire and safe markings, as well as the hard-anodized type 3 matte finish. The billet 80 lower includes an oversized one piece trigger guard as well. The mag well is broached, and due to the billet nature, the lines and angles are sharp and have a unique, refined look to them. 

Premium 80% Lower Fire/Safe Marked Billet (1-pack)

What’s Different

The biggest and most important difference between this premium billet 80 lower receiver and a standard billet receiver is the aluminum material. Our standard billet lower receiver is made from 7075 T6 aluminum, which is incredibly strong and very durable. Its strength is valuable but when it comes to milling a stronger material is more difficult to cut. Our premium billet 80 lower is made from 6061 T6 aluminum. Like the 7075 alloy, it’s heat tempered to earn its T6 rating. While the 6061 material may not be as strong as 7075, it’s not weak material by any means. Unless you plan to cut it with a torch or saw it into little pieces you won’t notice a difference. 

What is noticeable (and a nice benefit over 7075) is the ease of milling 6061 T6 aluminum compared to 7075 T6. It’s easier to cut through so you can finish the milling process quicker, and you’ll have to apply less effort with your router and bits, prolonging their lifespans as well.

Get Threaded


Our new billet lower receiver also features a threaded bolt catch release hole and a threaded rear takedown pin hole. These small features are unique in the fact it makes assembling your lower a much simpler process and greatly reduces the time it takes to install a lower parts kit. 

The threaded bolt catch release eliminates the use of roll pins and makes installation a snap. Using the included hex key you just twist and screw the pin into place. It’s the simplest method imaginable. The rear takedown pin hole is threaded and with the screw in place it’ll hold the detent and spring. This allows you to easily swap end plates, and remove the buffer tube without having to worry about the spring flying out. 

Get Building!

Our premium billet lower is aimed at making every step in the AR kit building process as simple as possible. Our premium billet lowers makes both milling and assembling easier, more precise, and more intuitive. Want one? Check ‘em out here! Pair with one of our highly popular AR 15 Rifle Kits, like the one below, and you’ll have an easy-to-machine, perfectly finished black rifle that you can say you built yourself.

5.56 (16" Stainless Barrel & 13.5" M-Lok Handguard) AR 15 Rifle Kit with 80% Lower Fire/Safe Marked



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