I love my new Tantal!  I encountered just one problem with the build.

The gap between the floor of the receiver and the bottom of the front trunnion is just a bit too narrow.

I filed the lug on my bottom handguard to fit, but this is unique to this gun in my VERY limited experience.

A test fit of a Magpul AKM handguard, a different Tantal bottom and a generic wooden one all have the same issue with the gap being too narrow.

Just a couple of millimeters.   Just enough that you can't get the lug into the gap.

I repeat that I am happy with my receiver and the resulting rifle!  I'm not looking for a replacement or repair.  This is just to let you guys know.

I'm probably just the victim of tolerance stack-up with a short receiver and tall trunnion.