I must jump in here, as I too am the proud owner of a NOT Krieger. It's a 32R and the button works backward from the the K models. Plus I had a real Krieger mag one time & it did not fit, though it is possible the spares were matched to a rifle. The extra screw on the left is also present. While not a pristine example, possibly one of a kind, the rifle is clean, @ 95%, & groups @ 2-3" at a hundred. She's a nice old Lady worthy of respect

. I think some of my early posts have Pics of this one....
Carl