I looked at those before. Isnt the second link just a red dot?
The first link looks good, but you always take the risk when buying a knockoff/clone product, as it could be POS. (Or so I believe.)
I'm purchasing this soon, as I hear its good. (Has a 1" diameter, so you can put 1" diameter weaver rings around it to connect it to a rail.)
Its 4x with range estimating. http://www.businessvision.net/edge/M...=LESCP%2D432M1
You can buy it from their warehouse in Peterborough, Ontario. Or buy it from their site.
EDIT: They also sell the weaver rings on their site. They sell low, medium, and high sizes. Ask me if you need a link to them, as navigation can be a little tricky on the site.)