Here are some photos with instructions on how to disassemble a M11A1. The one in the photos is an HFC/TSD M11A1, it has a KSC Magnesium Bolt & Metal Upper Receiver. These instructions are not perfect, but should help guide you if you have no experience disassembling a M11A1..
Here is my HFC M11A1. This one is also sold by "Team SD" and is the same gun as the M11A1. All M11A1 parts, including KWA & KSC are cross compatible, so you can upgrade your guns with parts from others. especially the Magnesium bolt :)