I currently have an mp 15-sport. I have it set up with a Vortex strikefire. I am thinking abotu getting a mp 15-22 that is simliar but am confused about the differences between some of the models. I know the moe has the magpul sights and stock but I am looking at getting either the standard (811030) or the A1 style comp (811033). Is the compenastor on the end the only difference between these 2 guns? What exactly does the compensator do (I know my 15 sport has one)?
To start with I will probably just shoot the 15-22 using the iron sights but might want to put a Vortex reddot on it some day. If I did will it cowitness with the stock iron sights? Can I replace the stock rear sight with a folding backpul sight down the road?