The Marlin No. 20 is a slide-action .22 caliber rifle with an octagonal barrel and tubular magazine, bearing patents of August 12, 1890 through November 29, 1904, produced by the Marlin Firearms Co. of New Haven, Connecticut.

Marlin Glenfield Model 20
TypeHunting rifle
Place of originUnited States
Production history
DesignerMarlin Firearms
Designed1960
Specifications
Mass5 lb (2 kg)
Length41 in (1,040 mm)
Barrel length21 in (530 mm)

Cartridge.22LR, .22 Short, .22 Long
ActionBolt-action
Effective firing range100 yards
Feed system7 rounds; box magazine
Sightsadjustable open rear, ramp front sight; receiver is grooved for a scope mount

It is not the same as the Glenfield Model 20 (Marlin 780). The Model 20 is a bolt-action rifle that fires primarily the .22LR rimfire cartridge, but also the .22 short, and the obsolete .22 long (all rimfire cartridges, and can all be fired in the same gun). Produced by the Marlin Firearms Company of North Haven, Connecticut, it was in production from 1960 to 1966.

Uses

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The Model 20 is well-suited for small-game hunting and vermin control, as well as a target practice gun.