Is it a 1/3 co-witness height?
That is correct, 1/3 is co-witness.
http://progunfighter.com/co-witness/
Most folks offer exact or lower 1/3 co-witness options, I want lower 1/3 and the Bobro site does not specify.
IIRC you can add spacers that come with m4. I can’t remember if I did but it’s perfect for me. Bad pic, but you get a sense of height.
