(Continued from Part 2. This concludes the article.)
Results

I think my lower receivers turned out great (Photos 15, 16, 17 & 18). The machined edges are straight and sharp. The trigger pocket walls are smooth, almost mirror-like. There are slight tool marks from the end mill, but no touch up or sanding was done until after these photos were taken. Then I touched up the side holes and the opening for the trigger slot with some Aluminum Black by Birchwood Casey. It’s quick and hides the raw aluminum edge.
I didn’t treat the entire inside of the trigger pocket, I think it looks cool and at any rate is completely hidden when the upper receiver group is attached. The lower parts kits were from Palmetto State Armory, and everything installed correctly with one exception that was my fault and was corrected as described shortly. Uppers were installed and the rifles were test-fired. There were no failures to fire, extract or eject.

The Easy Jig 2 was solid and robust. It seems like a very well thought out product. Some of the parts do double duty, like the side plates that rotate and reattach to mill either AR-15 or AR-10 lowers. The red buffer screw support does the same and also allows for attachment of your vacuum hose. And the drilling block inverts to drill the pilot hole or mill the trigger slot. There was very light wear on the top router plate from moving the router. There was a little wear in the measuring pockets from touching it with the end mill. Since these hash marks are engraved into the router plate, I don’t believe this will be an issue affecting function.

My results were consistent from one lower to another if I followed the directions. The jig allows the trigger pocket, trigger slot and side holes to be machined and drilled with great precision. All the lower parts installed just as if it was a factory produced 100% stripped lower receiver. I like that the jig doesn’t have to be disassembled to begin milling another lower receiver. Documentation supplied with the jig was also excellent. A 26-page manual and a 6-column quick reference guide are clearly written in good English and the many illustrations are precise and very helpful. There is a company video and many other YouTube videos available.
I used 80% Arms for my source of 80% lowers. I felt that I might have the best results by buying the lowers from the company that made the jig. Their lowers are excellent quality in fit and finish.
80% Arms doesn’t sell firearms and they don’t work on completed lowers if you have a problem. However, they are responsive to questions and will offer remote help by phone or email. This is from their website under warranty:
“80% Lower Replacement Program: In the remote chance you make a mistake while using an 80% Arms Jig that damages your 80% Arms lower, we will replace your lower at a 50% discount off of the list price.”

