AR10 & .308 80% Lower Receivers

What is an AR10 / LR 308?

An AR10 (also known as an AR-308) is one of the most versatile high powered rifles on the market, shooting the venerable .308/7.62x51mm round. It’s most commonly used for long-distance target shooting, hunting, and other precision rifle work. AR10 rifles are capable of shooting out to 700 yards and beyond which makes for a great sniper or hunting rifle. The AR-10 is also a great option for hunting due to its ability to take down nearly any commonly-hunted game in North America. It’s mostly used to hunt deer, elk, and pronghorn. Out in the desert, it makes a great coyote gun across wide-open distances.

WHY BUY AN 80 PERCENT 308 LOWER?

An 80 percent lower receiver is not considered a firearm until the remaining 20% of the work is done by using one of our Easy Jigs. There is no need for an FFL, transfer fees, and or registration. They ship directly from our warehouse right to your doorstep!

80 PERCENT ARMS 308 LOWER

Our lower receivers are precisely machined to exact mil-spect tolerances. We provide our customers with the best quality 80 lowers and ensure you get the best 80% lower receiver by implementing a multi-inspection process to ensure you get the highest quality .308 80 percent lower receiver for your quality build.

All AR10/.308 80% lowers below can be completed with our Multiplatform 80% lower jig

AR-10 80% Lower Features

Our AR-10 lower receivers are made from high-quality 6061 T6 aircraft-grade aluminum, coupled with a durable, rugged design. They are capable of withstanding the toughest environments, be it in the field or out on the range. There is a raw aluminum finish with a reinforced bullet design, increasing its toughness. These receivers also have a sizable heavy-duty trigger guard for safety purposes.

Our AR-10 lower does not require an FFL while purchasing. In addition, they are compatible with different magazines, such as the DPMS and SR-25 magazines.

Machining Process for AR-10 80% Lower Receivers:

The only operations left for the AR-10 to be complete include:

  • Attaching the fire control group

  • Drilling the trigger pin hole

  • Drilling the hammer pinhole

  • Drilling the trigger pocket

  • Attaching a safety selector

Tools required to complete 80% lowers:

  • The drill presses

  • Vise

  • Machining oil

For advanced machining, you will need elite builder jigs of different sizes:

  • A 5” 3/8 drill bit

  • A 3” 5/32 drill bit

  • A 3” 3/8 short end mill

  • A 4” 5/16 short end mill

  • A 4” 3/8 long end mill

Completing your AR10 80% lower involves the following steps:

  • Secure the lowers on the right jig plate, and secure the left jig plate. Stand the setup vertically.

  • Install the template plate holder atop the jig and bolt it.

  • Bolt the pilot hole template and vice into the template plate holder.

  • Install the ⅜-inch drill bit on the drilling press and begin drilling through each pilot hole at exactly 2.000-inch deep.

  • Drill the receiver to 1.375-inch deep after replacing the ⅜ drill bit with the shorter ⅝" drill bit.

  • Lubricate the template guides with machining oil, and drill receiver pilot holes to 2.000-inch deep.

  • Bolt the second milling template to the jig.

  • Repeat step above.

  • Mill the receiver to 1.375-inches deep by replacing the drill bit with a 3/8-inch end mill bit.

  • Finally, you have to drill the hammer, trigger, and safety pinholes.