$194.49: Makita XGC01Z 18V LXT Lithium-Ion Cordless 10 oz. Caulk & Adhesive Gun, Tool Only at Amazon

Amazon.com has Makita XGC01Z 18V LXT Lithium-Ion Cordless 10 oz. Caulk & Adhesive Gun, Tool Only for $194.49.
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About:

Makita-built motor delivers 1, 100 lbs. Of dispensing force to dispense the highest viscosity adhesives and sealants
5 speed dial optimizes flow rate from 0-66 IPM
Variable speed trigger allows user to match speed to the application
360Degree rotatable cartridge holder fits 10 oz. And 300 ml cartridges
Drip-reduction feature automatically relieves pressure on the material when trigger is released to prevent unintentional dispensing

$194