05-14-2016, 06:41 PM
(This post was last modified: 05-14-2016, 06:44 PM by customcutter.)
I finally started back on my side charging upper for my next build. I machined the slot in a thin wall upper without any problems.
Then I proceeded to try and modify the bolt carrier to drill and tap it to add a bolt handle. It is a nickle boron bolt carrier that I picked up at a gun show a few years ago. I ground the NB off in the area where I was going to do the machining. Grabbed a cheap chinese Tin coated 2 flute end mill and tried to mill a flat surface. No dice. Anyone have any idea how hard, what Brinell or RC the bolt carrier should be. I don't want to try with another mill, until I'm sure the mill is capable of cutting it. All I did was polish the stainless steel, where I had ground the NB coating off.
Thanks in advance.
CC
Then I proceeded to try and modify the bolt carrier to drill and tap it to add a bolt handle. It is a nickle boron bolt carrier that I picked up at a gun show a few years ago. I ground the NB off in the area where I was going to do the machining. Grabbed a cheap chinese Tin coated 2 flute end mill and tried to mill a flat surface. No dice. Anyone have any idea how hard, what Brinell or RC the bolt carrier should be. I don't want to try with another mill, until I'm sure the mill is capable of cutting it. All I did was polish the stainless steel, where I had ground the NB coating off.
Thanks in advance.
CC