336 SC or Sporting Carbine had a 20" barrel and pistol grip stock.
336 A or ADL ("A DeLuxe" with factory checkering) had a 24" barrel and pg stock. Not to be confused with the newer 336A which is a hardwood stocked version of the standard 20" full magazine model
30 TK was a special model 336 action I believe made for K-Mart and had an 18 1/2" barrel and straight grip stock.
I don't know the years those were made but they are made no longer.
336 XLR is currently produced and has a 24" barrel and short magazine but is stainless and salt/pepper laminate. They seem to retail somewhat above $700 but I haven't checked lately and in the current market some sellers may have dropped their price a bit.
Those are off the top of my head. I'm no Marlin expert by a long shot so someone might come up with a couple more variations.
Gunnery, gunnery, gunnery.
Hit the target, all else is twaddle!
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