It's a flat pane of glass (well flattish) and some people acquire the dot on that unit better than in a tube (I am one of those people).
The other advantage (for me) is faster acquisition and less obstruction of forward vision when bringing the gun up and whilst shooting.
One disadvantage is these are not magnified. The two I have are 3 MOA dot versions.
The other advantage (for me) is faster acquisition and less obstruction of forward vision when bringing the gun up and whilst shooting.
One disadvantage is these are not magnified. The two I have are 3 MOA dot versions.