The EZ CAR 7.0 Rail Systems is an user friendly, easy to install, non free float rail system. We currently only offer this rail system for carbine and do no have a mid-length version on our future build plan. We do, however, have our Omega Rail 9.0, which is a user installed free float rail system that requires no gunsmithing or modifications to install. It's a straight forward replacement for mid-length plastic hand guards. It has the added benefit of having integrated sling swivel attachment points as well.