I tried posting this question in an older 500 topic, but did not get a response, so I thought I would try here. My question is I just purchased a 500A1 and would like to install a forend that I could mount a magpul afg on. I found a OEM tactical tri rail forend on amazon for $39.95. Does anyone have experience with these ? Are they any good ? If not any other suggestions would be appreciated.