So I have a couple of old Original Surefire 6p's. Out of curiosity, I put a cheapo $7 Cree Led drop-in I bought from Ebay into one. It is nice and bright, but I haven't had the desire to mount it on the AR and attempt to run it hard.

I have another 6p that is bone stock. I would like to upgrade this one and put it on the AR. Would me upgrading to a Malkoff drop in be all that is needed? Would the original head(minus the incandescent bulb) be just fine for weapons use? I know the body would be fine, but would the original momentary on/twist for constant on, tailcap be fine for hard weapons use?

Hoping somebody could clear this up. Sorry if this has been hashed before, I searched some pages back, and it seems like the x300 style or scout is the popular choice. I just like the option that if I were to use a mounted handheld, I could remove it from the rifle and it have dual use if I wanted to put it by the bedside or even in the glovebox.