[quote]no - mine was in the vault getting dusty when I got the crux - put the crux in - then shot for 1/2 hour - put back - dusty again - stupid gun - hope has some purpose in HOW expansion - would make it seem worthwhile[/quote] It's highly possible it will have further use, since it's not marked as fully upgraded once the crux is applied. As for its usefulness I used it in this weeks nightfall.