Can you change the way beats work to make their inventory smaller but give them attachment slots for magazines, for example give them attachment slots for 4 rifle mags and 3 pistol mags and make it so the larger mags (60 and 75rd drum, and 20rd vaiga drum) can only be put in the smaller inventory that's only big enough for a drum and maybe a few stacks of loose ammo.

As for the tactical and hunting vest I'd say leave the hunter vest as is since its civilian and doesn't have mag pouches to begin with. And for the tactical vest you can just give it an extra rifle and pistol mag slot