XL7 -- X7....SAME GUN. In newer models Marlin dropped the XL and just call it "X" now. I have two. One in .308 and .223, both barrels are stamped "X7"
Sometimes they will be labeled on the box XS for short action cartridges, i.e. .223 or .308 and XL for long action such as .270 and 30.06...They are all still X7s.
Your's should be a Tack Driver......
