Ok so I have 2 Browning B325's both built in 1988. One must of had a little more use than the other and is a little loose. Only in the opening of the gun there's no movement anywhere else but because the barrels drops open so easily I'm worried they'll be causing more ware in other areas, for example the metal that stops the drop of the barrel. My question is, how easy is it to tighten them up and is it a DIY job. I'm reasonably competent with this sort of thing so I'm hoping it's an issue I can tackle myself.