I have this one in my BOB from County Comm. It's not AM but it's a 4 band short wave radio. FM, MW, SW1 & SW2.
Very tiny and lightweight with a LED flashlight on it. Also has a clock feature and an alarm. Runs on two AA bat.
I also got the external 16 ft. antenna on a reel which clips on the telescoping antenna of the radio for extended reception on the short wave bands. You can get the reel antenna here.
For strictly an AM/FM radio which is a little larger than the GP-4L, they also have this one.