The Crosman model 1377 (also known as the "American Classic") is a single-shot, bolt-action, pneumatic .177 caliber pellet gun, featuring a rifled steel barrel and imitation wood checkered plastic grips.

A separately available shoulder stock (which Crosman designates model 1399) converts the rather long pistol into a carbine.

The gun is noted for being highly modifiable: a cottage industry has formed to provide its enthusiasts with parts and accessories.

[2][better source needed] There are at least 2 versions: the 1377 that is exported to Canada has a special valve relief that will keep the power output of the gun under the legal limit.

The PC77, or "Pumpmaster 77", is essentially a 1377c with different stamped markings and black plastic for sale at a lower price point.