I have an HK-91 and a CETME. I am about to have some disposible income available. I am thinking of an AR platform (I have always wanted an AR-10b from Armalite, but they are hard to find). I think I would like to have a full size rifle, not a collapsible carbine. I am not looking at a precision rifle. I want another battle rifle. If I go precision, I will probably go with a Howa. I have tons of HK magazines so I am considering a PTR-91. I like the M1A's, but I am not sure I want to get into another platform. Same with the FAL If I elect to go with an AR platform, I am not completely up to speed on magazine interchangeability. Which ones take the Magpuls?