If you have the nitto krote you will need to make the armour from pingpong balls and buy some 1/35 smoke launchers.
Or buy a gans for the armour sprue which is costly. http://static.hlj.com/images/wav/wavyk-04_6.jpg
But if you can still get yourself or have the new 3q krote you get the gans sprue with the extra armour and smoke launcher in the same box. http://www.coolkits.de/ebay/mak_kroete.jpg
The barrel is simply a 1/35 scale metal PAK 7.5 40/L46 barrel.