I must admit, I feel a bit dirty admitting this, however, Ryobi creates a nice tool. While it is certainly more DIY-ish than a Dewalt or Milwaukee, this is now the second tool I have been forced to buy from them and I have zero regrets.
This past weekend I picked up the Ryobi 18-Volt ONE+ Power Caulk and Adhesive Gun to tackle the aluminum flashing of the tiny house. Construction adhesive is some thick stuff and I was about to blow through eight tubes of the stuff. My nightmares from this stuff were enough for me to sneak through Home Depot with the ugly green box under my arm.
After laying down 160′ of adhesive, I can honestly say that Ryobi’s lil’ caulk gun is money well spent. And considering how often one needs to use it, my guess is it will last as long as I do.