Hey Guys, I just this evening finished milling out the trigger pocket for my Broken Arms 80% lower. I must say that I was very pleased with the results. I purchased the Jig, drill bits and the end mill set and was pleasantly surprised at how well they were made. The fit and finish were superb.

Rather than using a drill press, I used a MIll/Drill which is a little more rigid than most drill presses. Because of that I skipped using the first plate. I did use plates 2-5. On the next one I will probably just use plates 4&5 after drilling 2 3/8" starter holes. I think with the extra rigidity that the Mill/Drill affords and taking the .060 depth of cuts I will be fine skipping the first three plates.

I was very pleased with the finish, even though I did have a few drill marks in the sidewall of the lower. I could probably file these out, but they shouldn't affect the operation of the rifle so I will most likely leave them. Eliminating the first three plates will solve this problem since I will only be drilling starter holes in the middle of the pocket.

Mike, I was going to use an end mill holder (as I said in a previous post) but couldn't find my 3/8 holder. I wound up using a collet which worked out just fine.


This is the Mill I used to finish my recever.

 

Last edited by tmc_31 (1/25/2016 7:42 pm)