A 16" bar on a top-handle saw is unusual — most of the class stops at 14" — and that is the reason to look at this one. 7.5 lb bare, 10.3 lb with two 5.0Ah LXT packs fitted, 3,940 FPM, and a 30cc-gas equivalence claim. It is the lightest ready-to-cut 16" saw here, a shade under Stihl's MSA 220 C-B with its AP 300 S pack, which is the whole argument for the X2 approach: two small packs sit closer to the handle than one big one. Against it: the 30cc equivalence is modest for 16" of bar, so the chain speed falls off in hardwood faster than the bar length promises, and a 16" top handle is a long lever to control one-handed at height. It also runs the same two-pack arithmetic as the rest of the X2 line — every charge costs two batteries. The kit at about $599 includes two 5.0Ah packs and a dual-port charger.

Best for: Climbers and tree crews on 18V LXT who want maximum reach from a top handle at the lowest possible weight.

Specifications

Engine class: 40cc class (placed by shipped bar length)
Voltage: 36 V
Kit battery: 5 Ah
Bar length: 16 in
Bar range: 16 in
Single-pass cut: about 14 in (bar minus 2)
Chain: 3/8" low-profile pitch / .043" gauge
Weight: 10.3 lb, with two 5.0Ah batteries (7.5 lb bare)
Power type: Battery
Use case: Arborist
Warranty: 3-year tool & battery
Model: XCU09PT

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

7.5 lb bare
16" top handle, rare
Two 5.0Ah packs included

Where it is strong

Lightest 16" saw here with batteries fitted at 10.3 lb — the X2 layout keeps mass near the handle
16" of bar on a top handle, longer reach than almost anything else in the class
Captured bar nut and tool-less adjuster, so bar service in a tree does not mean dropped hardware
Two 5.0Ah LXT packs and a dual-port charger in the kit, usable across Makita's 18V range
Weather-sealed XPT construction, which matters on a saw used in wet canopy work

Where it falls short

30cc-gas equivalence is modest behind a 16" bar; it slows noticeably in hardwood
Needs two charged 18V packs per run, doubling the battery cost of every hour of cutting
A 16" bar on a one-hand-capable top handle is a long lever; it demands trained technique and full PPE
3,940 FPM is slower than the 40V XGT top handles Makita sells alongside it

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