What magazines would you recommend?

[acourvil]

The Ar Stoner above is their 5 round mag. They aslo have a 10 round mag that is looks like the AA mag above (which I think is the same as the ASC mag). Midway has both the 5 and 10 round versions of the AR Stoner mags. They also have 30 round mag springs, which you can cut to length. I think you will also need to trim the legs on the follower.