The Marlin Model 60, also known as the Marlin Glenfield Model 60, is a semi-automatic rifle that is chambered in 22LR. This particular rifle is marked with the JM stamp, indicating that it was manufactured by Marlin's factory in North Haven, Connecticut and is considered a higher quality than some of the other Model 60s. It is known for its Micro-Groove barrel, which has been a standard feature on the Model 60 since its introduction in 1960. The Micro-Groove barrel has a series of shallow grooves which replaced traditional deep rifled barrels, which was said to improve accuracy and reduce lead fouling.
This rifle is in excellent condition and features a 19" barrel and a 14-round tubular magazine. The Marlin Model 60 is known for its lightweight, compact design, making it a popular choice for target shooting, plinking, and small game hunting. It's considered an affordable, reliable, and accurate rifle that is easy to handle and maintain.