The magazine body needs to be securely clamped to mill out the slot, so I need an insert and outer relieved clamps (because of the ribs). I had a special mill cutter left over from a similar project
[coff, coff] so I used that to contour the front of the insert. I used aluminum. The clamps are also aluminum, with 1/4" milled grooves for the rib clearance. A slot was milled in the clamp for end mill cutter clearance and observation. I chamfered it for better vision.
The magazine body can now be securely held and clamped for the milling of a 1/8" slot for the follower pin/indicator.
All this for an operation that will take less than 5 minutes to perform...
