I have some experience with textures, but unfortunately, I am a real idiot when it comes to 3D models and maps. So I would ask for experienced designers of this forum to do some conversions weapons to Black Mesa Source (and I see a guy that make an awesome shotgun, really good work), of course, if you they want to answer my request if they can not, that's okay, I understand

Here some weapons models that I think would be cool in Black Mesa:
http://gamebanana.com/hl2/skins/44055http://hl2ep2.gamebanana.com/skins/47835 (but withouth the foldstock, I think that's the name)