I used Cinema 4D to make the animation,then I used blender to recreate it,it was hard because you only see tags,I could make new animations for you later if you want 
EDIT:there is a bug in the new alpha mod,the animations of the bren are lagging/bugging and it looks like the keyframes were modified in the weapon.cfg file,but they are not!!!Is it only me or does this happen to everyone?
There is a bug in the bren animation,it is using the thompson config file:
Line 9 in bren.weapon:
weaponConfig "models/weapons2/thompson/weapon.cfg"
Should be:
weaponConfig "models/weapons2/bren/weapon.cfg"
It is my fault,as i used the thompson in ETmain to see my anims,I forgot to fix this line of code,sorry 
thank you very much 
you are okay 
and PS:
I have build a position string in the weapon file:
gunpos “3 -5 0”
for example:)
its like how Tce Mod You can use now the models from tce mod