I got a Plano Gun Guard (36") from Wal Mart for $40, it's a fantastic hard case, super beefy, watertight, and pick and pluck foam. It holds my 15-22 with carry handle mounted optic so it's plenty wide, also enough room for 4 mags (or 2 mags and 2 boxes of mini-mags). CTD and Amazon have it for around $110, wal mart is definitely a better buy!
I can't find it on the WM website, seems to be in store only. Here's the link to amazon:
http://www.amazon.com/Plano-108360-G.../dp/B0029KKWT8