Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Does NOT fit on my Mossberg 500

The rear trigger pin fits perfectly but the two front holes in the mount itself are useless. Only one hole lines up with anything (the ejector screw), and this cannot be removed or the ejector mechanism will fail. I even contacted Mossberg and they said that the product is faulty and shouldn't be used without smithing.Further more, if you do feel like using the ejector screw port for the front of the mount, the more you tighten the screw the further in it pulls the mount - COMPLETELY misaligning the mount as a suitable point for any kind of optic.Plain and simple, this mount doesn't work without proper gun smithing. I am now using a zip-tie to hold down the front of the mount until I have it properly smithed. I don't give many bad reviews on Amazon, but this is one of them...