If you're looking for new weapons, the MK14 EBR mod should be at the top of your list.
It's currently one of the highest rated Fallout 4 mods and for good reason. It's an excellent weapon that provides you with a ton of customization options.
The mod includes six scopes, 3+1 stocks, three muzzle attachments, two barrel lengths, flashlight and also semi/fully auto capabilities.
Looks great, works great, can't ask for much more than that. Try it out.