Just a quick disclaimer…I received this information 3rd hand, so keep that in mind. I *adore* my ATG and have never had a single problem with it, but I know there have been a few issues with some of the newer guns. Maybe this will help…
October 15, 2008–I spoke with the 3M rep and have found out that there is a problem with the mold of the ATG guns, this has affected mostly the red 714 guns, but also some yellow 700 guns. 3M has asked all distributors of the ATG guns to stop shipping their stock and have been asked to return whatever they had in stock. 3M has ordered a brand new mold of the adhesive guns and will have new guns available the week of November 3, 2008 at the earliest.
The defective guns were manufactured starting in January 2008, some of the issues you might have experienced are tightening of the adhesive as you use the gun, it just not rolling right etc… If you believe you have a defective gun, 3M is going to work with you on this–starting Thursday October 16, 2008 at 12:00 pm CST you can call 1-888-936-3636. 3M will take your information and will send you a prepaid envelope to return your defective gun. As soon as the new guns are available they will they will ship it to you as well as a roll of adhesive for your troubles–make sure you completely fill out the form that they will send with the envelope
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I have never had a problem with my ATG either. But I have had mine for a few years now. I love it!!!
looking forward for more information about this. thanks for sharing. Eugene