The first model of the MP5 with fixed stock and red dot sight we expected and we saw in the trailer did not appear in the game at launch like the old model of the SPAS 12 with folding stock did not appear in the release of game.
I wonder, will release an update in which placed these weapons? 
What he wrote. Next time search the forums before you post.
Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.