I also have had the problem of not being able to fire at the objectives in Frontline.
So I have used ODEM mods, QuickyBaby Mods and Webiums Mods and have been able to fire at the objectives.
So there must be something in Aslains Mods that is preventing people firing at the objectives
Played yesterday with new mod pack and YES I can fire at the objectives.
Now deleted other mods and back to Aslains (much better selection of mods).
Thank you for resolving the problem