The Granberg G781-48 Handle and Rail Set is the 48-inch upgrade kit that turns a Basic MK-IV Alaskan Mill carriage into a complete rail-guided portable sawmill for logs up to 48 inches in diameter. The set ships two aircraft-grade aluminum rails plus zinc-plated steel handles sized for the largest standard chainsaw bars in the consumer and prosumer market.
The 48-inch rail length fits the same Granberg G778 (Alaskan Mark IV) and G777 (small-log) conversion carriages as the shorter G781-36, so an existing Granberg user can step up to bigger logs without buying a second carriage. The aluminum rail tubing stays rigid across a 48-inch cut, and the dual-handle layout still lets a single operator pull the mill steady across the full bar length without a helper.
Granberg has manufactured large-format chainsaw mill rails in Richmond, California since 1955 — the G781-48 carries Made in USA designation per the manufacturer’s listing. Pair the G781-48 with a Granberg G778-36 36-inch complete kit upgrade and a 48-inch chainsaw bar to mill the largest logs an Alaskan platform can handle, or step down to the G781-36 for smaller timber.
