Originally Posted by Echo
What exactly are the purpose of those holes? Ive got SMG bodies with and without holes in the bottom of the breech. Assuming those are the holes you were talking about.
I'm guessing it was a modification in the later SMGs to make sure the clips fed properly?
More progress today over lunch break at work but nothing really to take pictures of. Drilled and taped the new milled receiver for helicoil inserts. The original plan was to make it a "convertible" so I could switch between front receivers. But I should be honest with myself, its not practical because I'm only ever going to use the .68 cal SMG receiver thats in the works.
So I'm thinking I'll end up JB Welding the receivers together to make it a permanent SMG68.