The 'MP5 RAS' model was the closest fit I could find for this project (apparently for both L4D1 concept art and Combat Arms it was referenced from a Tokyo Marui MP5 RAS AEG), the other considerations were the CS:GO beta model and the MW3 model. This was a pain to extract, and my old texture rips had some issues, but (former) CA Game Master Calais helpfully provided the original textures.
Replaces the 'Submachine Gun' (model only) This particular model appears to be fitted with a Choate PDW-style stock for a normal receiver. It is highly customizable, and skilled armorers can 'stretch' or 'reverse stretch' the receiver in order to create an MP5/MP5K hybrid. Customized HK MP5A4/MP5A5 from Combat ArmsĮssentially a miniaturized G3, the MP5 is one of the most popular submachine guns.