ARMS rail system reliable?

I am going to be attending a carbine course soon to be able to carry my rifle on patrol. My rifle of choice is a 6920. I had gotten an ARMS #50 MCV at a good price and installed it my self. I liked that all that was required to install was removing the delta ring and springs, which I could do my self. Its a very light rail, mounting seems solid with 6 screws, and like the fact theres rail were I need it and none were I dont. So my question is, they dont seem very popular around here. Should I be concerned with anything? They basically serve only as flashlight holder for now.

Edit to clarify which model it is:
This is not the old big,bulky, and heavy rails that hooked to the top of your upper adding rail height. This is the one that mounts traight to the standard barrel nut via 6 screws and weighs 8.6 oz.

Regardless of what some may say ARMS does make a few good products. The SIR system is one of them. It is a solid rail system that was top of the line a few years ago. Nothing at all wrong with them other than it is not the newest, coolest rail on the block anymore.

You have a decent rail system that should do everything you ask of it.

Nope, it will work fine.

Had one on my first AR, worked fine. There are other rails out there that are better though.

Well thanks everyone, I will not be entering any popularity contest any time soon, just concerned with reliability since I will be putting it and the rifle through its passes on this course.

I used to have on an AR but replaced it with a Daniel Defense, which I like better but the ARMS will do the job.