Parallax Free Red Dot.

What is the cheapest red dot scope i could get that would be parallax free? I have 20 gauge mossberg 500 (i have two barrels for it a field and rifled, i would like to put the scope on the rifled barrel.) that i would like to get a red dot for. I also have a 12 gauge remington 870, an old .22, and .50 Caliber Muzzleloader. What would be your recomendations?

The Propoints are parallax free at 50 yards. I wouldn't go any cheaper than the Tasco PDP2 if you want it to hold up, especially on a shotgun.

I agree with Steven L on this selection. The propoints would be a good choice.