2009 model, last year of the JM stamp. Not a Remlin! Great condition. 1 box of ammo, scope rails and a soft case included. FTF in San Antonio at Academy on NW Military and 1604. No trades please. My price is super firm and very fair.
Google is your friend. It's a 20" barrel like every other. JM stamped barrels are pre Remington buyout. The Remington produced 336's are perceived to be inferior in quality.
I sold one just like it a couple years ago. In a way I wish I'd kept it but my hand hurts when I operate a lever action. Even so, had I the spare cash right now, I'd probably buy this one.