No
No, they are not.
Yes
Decent quality.
.22 to 450 Marlin
Revolvers are not lever action firearms. Sorry- can you rephrase your question? Lever action firearms are most often rifles, rarely shotguns. A very few lever action pistols were made, but not revolvers.
Browning BlR
22 Magum lever action
Most .22 BOLT action, pump and LEVER action rifles that are fed from a tube magazine will handle shorts, longs, and long rifles. Remington produced several auto loaders that wil handle mixed ammo- the Remington 550 may be the best known.
The first lever action rifle by Winchester was the Henry rifle.It was produced from 1860-1866.
A "sniper rifle" is simply a rifle being used for sniping. As for purpose built rifles intended for use by snipers, there aren't any. The lever action would be undesirable for a sniper, who may often have to fire from the prone position, and the tubular magazines common to lever action rifles cannot accommodate modern long range cartridges which use the spitzer bullets. Although some lever action rifles which feed from a box magazine have been made, they are very rare.
Not a factory chambering
Not here.