what i did, was use the 310 one that dropped to bump my still piercer from 300 to 308. then i went to the blueprints and bought a bunch at 300 attack and infused them to bump my other specials to 300. lastly i bumped up 2 junk legendaries special weapons to 300 so i could infuse them into the black spindle after it gets nurfd so ill still have a black spindle at 300. just gotta wait for nurf. lol