Nice! I had a chance to buy an Erma .22 back in the early 70s but got a Stoeger Luger instead. Big mistake!
The Stoeger was a jamamatic, shoulda bought the Erma. At least my next two Lugers were better (DWM and Mauser)!
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together.
US Army 1966-69, VFW Life Member, Retired Geek