the reload isnt going to be nearly as easy as you might think it will be. A bullpup design does not reduce recoil and how are you going to carry those magazines? how will they hold up against dirt and debree? and where is the trigger mechanism? the bolt looks like its reciprocating into the pistol grip, what about malfunctions, what if there is a double feed? how are you going to clear it easily?It's the same working principle as the FN P90, using helical magazines.
Reload would be like a bullpup SMG.
Being a PDW it would actually be light weight and it's bullpup design would reduce recoil. Only thing I have a problem with would be the gas venting port which I would move to the sides as a selective ambidextrous feature.