Latest upgrade. This probably is the last, because now I've completely cycled away all my n00bish purchases.
Grip Pod (authentic) combo forward grip/bipod. This thing rocks. I was never completely satisfied with any of the bipods I had before, so this very effectively kills two birds with one stone. I believe Pants has one of these on his Sig - at the time I thought it would be cooler to have the silly ass pistol grip flashlight thing that is now buried in the bottom of my spare parts drawer. Should have listened to Pants and saved myself quite a bit of money. Oh well. What fun would that have been?