RHOP Fit Mad Bull Black Python 6.03mm Airsoft TBB Barrel NO Sanding Needed R Hop R-Hop

When I placed this into my TBB it fit as advertised. However, after gluing it in place per the instructions and putting a couple hundred rounds through it, the shape immediately began to change and I got major over hop due to the rhop flexing and beginning to extend above the window. Once this happened, the nub was placing pressure on the rhop even with my HU set to zero...thus overhopping my .28s like crazy. Sent a message to Elvishtac a few days ago…no response. I’d give more stars if I could get this to work.**Update: Got a reply and a replacement, so I added a star for the customer service. We’ll see how things go with the replacement.3/3/19