Oh fun, a post totally irrelevant to the game, but I think this might deserve some answer, because so many people get this wrong.
Long range is a very vague term in the world of firearms. By rule of thumb one might define long range as any distance past 700 yards, but one might be referring to the longest range their cartridge and rifle combination might be accurate at.
A winchester '94 isn't especially accurate, and .30-30 (previously named .30wcf) is definitely not made for very long range. In fact, its ballistics are similar to the Russian 7.62x39 cartridge. 200 yards is considered a decent range for the carbine, past that point the bullet will start to drop like a brick. Hell at 300yrds you'll already be almost 3 feet under your target!
Also, the link you provided directs towards cheap optics for rimfire cartridges, in other words .22lr, .17hmr and the like. These are not designed for the more powerful centerfire cartridges like .30-30.
So what you want is an optic that is reliable and will lead your shots up to 150-200 yards. That is not long-range, but more like the lower-end of what is commonly considered as medium-range. I suggest a good ol' cheap Bushnell or Redfield 3-9x40. ''3-9'' meaning the range of zoom between 3x and 9x, and ''40'' meaning the exterior diameter of the front lens. The bigger the lens is, the more light it'll gather for a clearer picture.
Alright, now you've got a nice scope for your old lever rifle. Now you need a solution to mount it. Know that there are no miraculous ways to mount a scope and since the Winchester '94 rifle is known to eject straight from the top, your scope will need to be off-centered to the left to allow for undisturbed ejection. So if you're unlucky enough to be a lefty, you may already scrap that idea altogether. If not, keep reading.
There aren't 200 solutions to a receiver-mounted side mount for a Winchester 94, but most of them will require you to have a competent gunsmith drill and tap additional holes in order to screw in the fixture.
TL : DR I gave you the basic information to not look weird for when you'll meet your local gunsmith and ask him to slap a scope on your Winchester 1894.