M2-newb

I just received an M2 tactical w/ghost sites and would like to make some mods to it. Looks like this is the site to get some ideas/help. I would like to increase the shell capacity, change the bolt handle and possibly change the safety to make it easier to use. For the shell capacity I am looking at the DMW (Daves metal works) ben007. i have also seen something about the floating shell on the carrier. Does anyone have any info on either of these things? The bolt handle is small and has sharp edges. I would like to use a similar one to the handle on the M4. Does anyone know if the M4 handle will fit the M2? I have looked at a few different handles but I don't like the fact that they rotate freely. I am also looking at the DMW safety for ease of use. Any experience with this piece? Thank you for the advice in advance.