Archangel aa132 doesn’t fit rem 870 forend - ProMag Archangel Remington Model 870 7-Round 20-Gauge Shell Carrier

I was excited to get this and install it on my Remington 870 express. But the product came without the necessary Allen keys to install. After improvising and finally getting the screws in, I went to open the chamber and realized that the stock forend runs into the shell holder. I had been given no notice so would never have guessed that a product designed for a Remington 870 would not work with the factory forend. To make it work I would have to replace the forend. Between not having the proper tools included and the lack of warning that the factory forend does not work with the shell holder, this is all been a huge waste of time. Besides that, the product itself looks solid and I wish it would fit