This weapon fused with itself will more than likely make an awesome pair of beam claws with high offenses and overall defense +7.
The more defense you have, the lless power you will have.
Didn't you notice that weapon has 5.5 ranged, 4.5 melee and overall defense +7, and nothing else?
If I fuse a duplicate of this 334 value weapon with itself, it should average out to around 334 anyway. And because the value is so high there is a
good chance overall defense +7 will pass on as it's the only modifier, along with the high ranged damage and high melee damage. CHANCE, is the key word. I can't test this yet.
If the modifier doesn't pass on, then more than likely I'll end up with a weapon with 6 stars in both stats and the maximum possible value for a no-mod weapon.