Genuine Makita Piston B (part no. 142072-0) — a ready-to-install piston assembly referenced in Makita parts diagrams as "Piston B Complete." It replaces the worn piston sub-assembly in the feed/drive of Makita caulking and heat-gun style dispensers, restoring smooth, consistent rod travel and reliable bead/control during dispensing. This is the exact replacement listed in Makita parts BCG180 and DCG180 cordless caulking gun.
Example models this part is listed to fit include BCG180 and DCG180 parts breakdown also shows 142072-0 as Piston B Complete. If you’re repairing a Makita caulking/dispensing tool, this genuine Makita replacement is the direct-fit Piston B referenced in official parts lists and repair diagrams. Makita parts are shown in the manufacturer diagrams for these models.
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