Thanks guys. Was wondering if was useful to buy that alteration

We wish it were that easy. Sadly it's not - particularly on a map like Silence. The other Magnum could be wearing heavy magnum protection rendering your damage minimal. They could be constantly on OD, which an organised/tactful team can manage easily, and surrounded by mines, There could be a faithful Isida nearby, effortlessly eradicating whatever damage you had inflicted. And of course, they'll no doubt have buddies (Rico, Thunder, Smoky, Striker, Rail, Twins, Hammer, another Magnum) in your side of the field, hitting you and putting you off your aim. Probably safe to say that in any of those circumstances your attempts to kill them will be utterly fruitless.