Take the rifle apart fully and take the barrel out with the barrel wrench because the mepro is attached to the barrel itself, loosen the nuts take the mepro off then put on a aftermarket rail from can-am or dlask ect... MAKE SURE YOU PRESS IN THE TAB ON THE OTHER SIDE OF THE BARREL RELEASE LUG WHILE YOU RELEASE IT,, ALSO MAKE SURE TO TAKE OFF THE HAND GUARDS AND PULL OUT THE CHARGING HANDLE ROD BEFORE YOU RELEASE THE BARREL OR THE ROD WILL GET DAMAGED..