[Azathoth]

+1 for the primary arms.

I got linked to them from Lightfighter for a cheap alternative to the T-1 on .22LR. It is designed for a firearm. They don't ship to Canada.

Bushnell holosights are excellent as is the TRS-50? by them it's a micro style clone.

There are high end German clones that cost 80-120 dollars that will hold zero on real guns. Those clones are genuine holosights. I've read about them on Chinese airsoft forums (they are made in China). And I've seen them at a local tactical supplier. Apparently, the story goes that the guy who made the first holosight for bushnell quit and started his own company.