A really great gun mod.

I've played many modpacks with TaCZ, in my own packs as well. If the pack is military/apocalypse related, TaCZ is a perfect choice.

Gameplay.
TaCZ has lots of guns, like a lot. From small handguns, to heavy machine guns. All or most of the guns have unique SFX, stats, and well done overall design. There's also support for gunpacks, which are community addons, which offer lots of choices for the player if you want to keep the mechanics and feel of TaCZ but want a whole separate loadout of guns. TaCZ has a lot of features that makes it a good choice for lots of modpacks.

Performance.
Performance is decent, only real issue i've encountered is when you are holding out a gun when using shaders, which then causes lag/FPS drops.

Aesthetics.
The models and textures are absolutely amazing, very detailed yet still mostly vanilla looking, which i find impressive.

Not much of a fan of the tooltip descriptions, as i consider them a bit unnecessary and just bloats the tooltip from important information like the damage and ammo count, though it's just a small nitpick.