Well, it's been a loooooong time but I finall managed to finish the MAC 10.
Scope rail is 3d printed. Silencer is a heavily modified from the one that comes with the airsoft. There are a lot of inaccuracies if you start to nit-pick. Spacer between silencer and MAC should be thicker, scope position and rail are not 100% and a bunch of other small things. Normally, these things might drive me nuts but since this is a 'found parts' build and I didn't want to work on it forever I figured it's 'close enough' because overall it looks the part. If there was an all-metal MAC 10 available I might've kept going but there is, as far as I have found, only this plastic one on the market- the others are MAC 11s.
A couple months ago, I also finally found a good stock of copper and brass bar, so maybe I'll get back to the eagle bracelet soon as well. We'll see!