I was playing with my brother in Elver with this mod, in my locally hosted server.
I noticed that some of the weapons were incorrectly shown in hand when equipped.
From my experience, the feel of the weapons are also different, an example is the Wisp, where it is shown as a Wasteland Falcon, sounds and recoil mechanics are also replaced to that of the Wasteland Falcon.
I did some testing in single player too and there were no problems, so this bug is exclusive to multiplayer instances.

For now, what I noticed is:
The Wisp (Vanilla Pistol), when equipped shows up as the Wasteland Falcon (Mod's Desert Eagle).
The Skillark (Vanilla Bolt-action, standard variant) shows up as the Svetovid (Mod's Mosin-Nagant).
The Bootlegger (Mod's Micro UZI) shows up as the Gordon (Mod's MAC-10).
The Bullfrog (Mod's UZI Pro) shows up as the Gordon.
The Sauce (Vanilla Dragunov) shows up as the Sarutoga (Mod's M82A1).
The Bloodeagle (Mod's SCAR-H) shows up as the Annihilator (Mod's M2HB).
The Heatwave (Vanilla M249, non-airdrop version) shows up as the Annihilator (Mod's M2HB).
The Mosca (Vanilla Suppressed AR-15, non-airdrop version) shows up as the Blaststrike (Mod's M4A1).

I will keep using and testing the mod in my server, and list out any more in the thread, editing as I go.