Options for filling gun and small bottle

I just ordered a new airgun that is feed by a 480cc bottle. Although, it's not my first big air reservoir gun (30 cal bobcat had that honor) I don't intend to pump the new one. My typical usage is low, so I think a buddy bottle that allows a couple of fills, and a compressor that can fill gun and a bottle that size would be my best option. Any thoughts and experience for some different options would be great.

Thanks,

Dave