While not a great hopper by any means, the Ammo Box II is pretty neat and innovative.
Here are just a few of the unique features the Ammo Box II used:
Integrated elbow/replaceable neck to change the neck size or fix a problem
A sliding door/lid
Integrated barrel plug holder
Square shape with interior feed ramp
It's too bad most models of the Ammo Box two were made out of brittle plastic and that the sliding door didn't accommodate a standard pod or this hopper might have been a little more popular.
You can find a few Ammo Box IIs in the Ammo Box category nested in ''less than 150 rd hoppers.''