The AR-15 design was created some 80 years ago? Who knew?
And the Nazis used to punch holes in the Allied Forces in the Battle of the Bulge? Why are we only learning this NOW?
The weapon of choice for most of the Wehrmacht up through 1945 was the Mauser carbine. Walther carbines were also widely used.
Some of what vaguely resembled the AR-15 were also produced, but close examination would have disclosed great differences in design.
Far cry from 5.56mm (.223 caliber).
And Nazi soldier prized M1 Carbines and used every one they could capture.