If you want a meaning of a word, why not look it up? "Entry lever" is just a marketing euphemism for "cheap".

Fortunatly, the question of "what is a good gun" is too complex to be solved only by the price. I think I still have a clipping from a local paper, dating 1992. It reads: "For sale - a shorgun with two barrels, by English firm Purdey, with hammers, damascus steel, in good condition OR SWAP FOR A PUMP 12 GAUGE SHOTGUN" Would'a been a nice entry-level piece, what?

Russian Hunting Shotguns