Took my $6 special to the range today because it arrived as I was packing the truck. Have nothing bad to say. Nice clear dot and no hiccups for over 100 rounds with the mark 4. Bright dot easy to see in the sun today. Positive clicks on the adjustments.
Amazing walk down memory lane here. I didn't even know what I didn't know but the fine folks here set me straight and not too much abuse... I can't answer your question but hopefully someone will shortly.