User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-25033519-20141118215628/@comment-184612-20141119174451

@NargaFeeder;

It actually doesn't seem to be a flat boost. I've spotted a few weapons get a different boost in attack and it needs to be tested more.

@Dax the hunter;

For some of them, yes. Some Relic weapons also glow.