There are a couple of alternatives to consider when completing your 80% lower receiver,. To complete the 80 lower, most utilize a jig to assistant in the machining procedure. The 80 lower jig guarantees that you bore or cut into the lower where you ought to, and you don't where you shouldn't!
AR-15 builders have various 80 lower jig to look over yet they are by and large separated into two fundamental classes. The jig that is most regularly known and offered by most 80 lower manufacturers is the drill press jig. The second less normally known, yet far unrivaled is the router based jig.
80 Lower Drill Press Jig
Finishing your 80 lower requires you to use either a handheld drill gun, or a drill press. The jig guides you in drilling upwards of 42 different holes in the area of the fire control pocket. Some drill press jig use a smaller bit such as 1/8" for the initial steps and then graduate to a larger bit such as a 3/8" to finish removing the aluminum from the fire control pocket. Additionally, like all 80 lower jigs, your drill press jig guides you in drilling the three horizontal holes which will house the trigger, hammer pin and fire/safety selector switch.
The Rugged 80% Lower Jig and the Tough 80% Lower Jig are two drill press jig options that will certainly help you get the job done.
The Rugged 80% Lower jig is a bargain buy, coming in at $89.95!
The Tough 80% Lower jig offers a few more features and comes in at $139.95.
80 Lower Router Jigs
The second 80 lower jig option of using a handheld router in combination with a drill gun/press is less known but arguably a much better jig. Using the 80% Lower Easy Jig to finishing your lower, you'll start by with drilling 10 3/8" holes into the fire control pocket area, similar to the most drill press jig. However, the next step is what makes the router-based jig stand out compared to drill press jigs. Rather than continuing to drill another 40-something holes with your drill press, you jump in with the handheld router and end-mill bit. Using the router, you'll make pass after pass eating away 1/4" of material with each pass. It's recommended that you do 6-11 passes to finish the fire control pocket.
The 80 Lower Easy Jig comes in at $194.95 (which includes the tooling). However, the strength, durability and speed make it the most popular option. Using the router based jig system, a builder can machine lowers in 1/2 of the time and complete upwards of 20 different lowers!
At AR-15LowerReceiver.com we offer a variety of jigs for you to finish your lower receiver and AR-15 Build Kit!DISCLAIMER: If you are new to the world of DIY AR-15 building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. We are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.