Major features include micro-groove barrel, a 2-position safety lever, walnut stock, and 7-round box magazine.
Production of the model 780 ended in 1988, and it was replaced by the Marlin 880 in 1989.
The Marlin Model 780 features a 21.25-inch (540 mm) barrel with micro-groove rifling (16 grooves).
Since it can chamber .22 Short it is capable of target practice or pest control with less noise than a .22 Long Rifle.
Its microgroove barrel makes it highly accurate at longer distances compared to most other .22 LR rifles.