Unlike the Mamba 5.56, which went from a standalone weapon to an exclusive set for the AK 7.62, the SBR .45 takes the opposite approach of being an exclusive set turned standalone weapon. The single and akimbo version are rather boring 99 damage SMGs who's only real strength is having a faster reload than other SMGs in their damage class. Single version is unlocked at level 45, Akimbo version is unlocked at level 25.
Comes with 3 stocks, 1 upper, 4 handguards, 2 iron sight options, and 3 magazines, with one it shares with the Kross Vertex.
It also has built-in compatibility with Restoration Mod.
Appears as the Signature SMG and Akimbo Signature SMG to people without the mod installed.