I have a Remington 870 Express in 12 ga. form. I had a 1.5 x 4 Simmons put on. It has a pretty beefy side mounted scope plate (can post pic if you want). I've had it for 3 yrs now and it seems to be holding up well. I don't shoot very often though. Cost was just under $100 for the whole setup. I wish I had a bit more power as I'm very comfortable shooting this gun to 125 yards and with my eyes the 4X isn't enough.