How would it benefit the server: I think that it would be a benefit because we need some more special weapons, and some new weapons, the original weapons are getting bland and old. And these weapons are preety cool i think. Look at the additional notes for my YT video on this. EDIT: I also think they should have a high price so it cant get in the wrong hands (except the harpoon)
Potential Issues/Exploits: The 1st one is kinda OP :/
If you agree on 1 weapon, then say i agree on IED Detonator, Nitro Glycerine, or Harpoon, and here is my video:
Drug dealers can already make nitro for use, the IED bomb could be used for a bigger price from the explosive guy, but I believe the harpoon doens't have much use.