Mp5K with stock extended with use as mp5 and stock collapsed when using as hand held smgs (tec 9 or micro uzi). I perfectly positioned the weapon in the hands according to the ped.ifp that I use so it may differ for others. If you want to increase the mag capacity to fit the model use the San andreas ammunation tool

http://www.gtagarage.com/mods/show.php?id=3308