Using Ivans Space Marine mod, I decided to make a Dark Angels mod. Here are the changes:
New guns:
Flamer-Never commented in, just added a sprite
RPG-Much like the RPG from BF.
Scout shotgun- An auto shotgun used by scouts. 

Changes to existing guns:
Bolter, Bolt pistol, Heavy bolter- Range increased, now fires explosive rounds. Bolter and pistol now slower rate of fire
Sniper- Ranged increased. 
Chainsword-Can now hold down fire. Very fun weapon. 

This does not replace anything. If you want your Space Marine faction to use these weapons, please replace the index in devices/weapons with the one included.

I take no credit for these wonderful sprites, save for the shotgun, RPG and the flamer. 
I did all the re-spriting. 