the barrel would cost more than a new gun
only made for 4 years and discontinued 45 years ago
you could get a maverick 8rd 20in model for 160$
i paid 200$ for my 870 from k-mart 9years ago
Model 878
Description: Lightweight, gas operated, autoloading shotgun "The Automaster"
Introduction Year: 1959
Year Discontinued: 1963
Total Production: 63,500+/-
Designer/Inventor: L.R. Crittendon with design team of Ellis W. Hailston and Harold L. Hameister
Action Type: Gas operated autoloading
Caliber/Gauge: 12 gauge
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