I am looking for some help on choosing a for end. I know there is going to be a lot of different opinions and that is what I am looking for. Here is my scenario. I am forming 1 some ar lowers and want to build some sbr's. For this build I am going to be using an AAC M4-1000 that I already have. I am wanting to use that because the M4-2000 has a locking pin that would have to be accessible. I am looking for a rail that would cover up most of the suppressor. I am going to be running a 10.5" barrel. The can is about 6" long and has a 1.5" od. I am thinking a 14"-16" quad rail would give it the look I am looking for. Any one here build something like this? If so what did you use? Thank you for your help.