I've owned several 336's and currently own a Marlin 30TK in 30-30.  The TK differs from the standard 336 carbine in having a 18 1/2 inch barrel, a shorter forend, a 2/3 magazine , hardwood stock,  simpler sights, and weighs about 6 to 8 onces less.  My 30TK is very compact and a great carry rifle.  These, I believe, were made in 1989-1990 for KMART.  Hope this helps.