This is not actually my creation; I got it from 
http://onyx.malagraphixia.com/HK_MP5/HK_MP5.htm, this is not for sale because 
the original creator of this had to collect 909 pieces and spent around $90 
alone just collecting the 160 macaroni bricks, so it would be very hard to 
collect all the pieces and it would be very, very expensive to buy.