hmm, another good idea , thanks Footman.
If I could model I would have a go at the Q2 Machinegun, but I can`t.
I was thinking could the barrel be attached to the Q3 machinegun using MD3compile and added to my PK3 as a substitute??.
EDIT:
Problem solved, I altered the cg_ents code, now the barrel shows, thanks for the advice everyone.