Filled the Stockpile Acheivement

It´s 100 Points and a golden Trophy on PSN, so I would say yes, it includes every new weapon.

The achievement picture shows the new grenade and dagger, so they´ll possibly be in there as well.

Although, they´re not being considered in this guide:

https://www.trueachievements.com/a239691/filled-the-stockpile-achievement

yea for someone that don't get alot of scraps its gonna be a ruff one getting the dud club lol i know i think i,ve hit 1 puzzle so far

I just scrapped all my legendary skins right before the battlepack changed and luckily got the puzzle pieces required. Granted I no longer have any legendary skins but I wanted the Dud club more than my legendary skins. :P

strange i unlocked everything and killed with every gun, inlcuding, pistols,new melee weapons and grenades.

But still unlocked???

Are you sure you also killed with both variants of any of the new weapons? Eg. in case of the parabellum you have kills with both the Low Weight as  well as the Suppressive variant? And the same for all other new weapons that have more than 1 variant?

Because it seems in that sense this trophy/achievement seems to differ from a similar trophy/achievement that came with TSNP, Maître d'Armes. For that one 1 kill with each of the new weapons (regardless which variant was used) was sufficient, but in this case it specifically mentions all variants in the description.