9.2 lb with the battery in it. For a 14" top handle that is the headline, and it is two pounds under Milwaukee's M18 equivalent with its pack fitted and well under DeWalt's 60V top handle bare. Makita gets there with a single 40V XGT pack rather than two 18V packs, and the saw runs 4,882 FPM on a 30cc-equivalence claim with XPT weather sealing and a digital communication link that cuts power before the pack overheats or over-discharges. Makita sells the same body with a 12" bar as the GCU01 and a 16" as the GCU03, so the family covers most canopy work. The cost is the platform: $629 for the kit, and XGT packs do not fit any other Makita line, so this is a commitment rather than an add-on unless you are already running XGT.

Best for: Working climbers already on XGT who want the lightest well-sealed top handle they can get with a battery fitted.

Specifications

Engine class: 40cc class (placed by shipped bar length)
Voltage: 40 V
Kit battery: 4 Ah
Bar length: 14 in
Bar range: 14 in
Single-pass cut: about 12 in (bar minus 2)
Chain: 3/8" low-profile pitch / .043" gauge
Weight: 9.2 lb, with 4.0Ah XGT battery (7.1 lb bare)
Power type: Battery
Use case: Arborist
Warranty: 3-year tool & battery
Model: GCU02M1

Manufacturer figures except the engine class and single-pass cut, which are derived here. What each spec means

9.2 lb with battery
4,882 FPM
12", 14" or 16" siblings

Where it is strong

9.2 lb with the 4.0Ah pack fitted, the lightest ready-to-cut 14" top handle in this group
4,882 FPM chain speed from a single 40V pack — no two-battery arithmetic
XPT sealing and electronic over-discharge and overheat protection, built for wet canopy work
Same chassis sold with 12" and 16" bars (GCU01, GCU03), so the family covers close and long reach
Captured bar nut and tool-less adjustment, the right details for working off a rope

Where it falls short

$629 for the kit and XGT packs share with nothing outside the XGT line
30cc-gas equivalence is modest; it is a limbing and sectioning saw, not a bucking one
Narrow-kerf .043" chain dulls fast in grit and storm wood
3-year tool and battery warranty against Milwaukee's five on the M18 top handle
Three near-identical XGT top handles in the range make it easy to buy the wrong bar length

Written from the spec sheet and the maker's documentation; owner reports for this model were too thin to summarize.