The model 380 was a continuation of a design that started with the model 152 then 352, 353, the 377 "Plinkster" and finally the model 380
The trigger guards were made of ABS plastic.
The front sight was a throw back (considering this gun was made in the 1980's) dovetailed post adjustable for windage (and elevation by swapping for taller or shorter posts). The rear was standard leaf/buckhorn type with adjustable elevator.
Disassembly was accomplished by removing the inner magazine tube and unscrewing the take-down screw
Action: Semi-automatic, blow back
Caliber: .22LR only
Barrel Length: 20"
Overall Length: 39.5"
Magazine: Tube, in butt stock, 15 rounds
Length of Pull: 13.5"
Rifling: Mossberg AC-Kro-Gruv
Stock: "walnut finished" hardwood
The model 380 was also brand labeled as the New Haven model 480, New Haven being Mossberg's value priced brand.
The rifles were not big sellers and after just five years production ended.
As with most of my Featured Gun Articles this one was inspired by a project gun.
Somewhere along the way it was exposed to a chemical or something that caused some serious corrosion.
Here is the gun, look for posts on the refinishing of this gun later this month.