That's a really great deal, welcome to the club! If you plan to use a 11.1v lipo you might want to add a mosfet to protect your trigger contacts, otherwise, it's all good stock and will last a long time. This thing will work very well with 0.30-0.32g BBs and should have no problem lifting them. You can go heavier, but I personally haven't seen much of a difference over 0.32g.
For the mosfet, something like this is easy to install and pretty cheap:
But as I said, if you will not use 11.1v lipos, you don't need that. It's going to be fine on 7.4v lipos and 8.4v or 9.6v nimh.