As taken from the Command Announcement thread involving the Mod Pack.
Mods included in the 506th Modpack:
-ACE3 select mods
-cTab
-FHQ Accessories
-ASDG Joint Rails
-DAR MAXXPROs
-grace weapon sway fix
-mrb A3 Voice Stop
-Robert Hammer Pistols
-Switch Weapons While Moving
-Ares
-506th MaxxPro fix
-SMGR DAGR
-MRT Accessories Functions
-MRT Accessories Functions FHQ LLM pbo
-Mighty's GAU Fix
-RHS NVG
-506th OpFor
-506th HuntIR Fix for RHS
-ACSZ Missing Content
-RDS Static Weapons
-Cypress Push to Hear
-Recoil Fix