Dexerto build of kar98k

[L.o.D.]

So I'm looking to try out this build that Dexerto has listed, but I don't have 4 of the options they list, even with the gun maxed out.
Any ideas?
This is the build; There's not even an option for a bolt.
Best Kar98k Warzone Loadout
Muzzle: Sonic Suppressor L
Barrel: Fahrenheit 29″
Laser: VLK LZR 7MW
Ammunition: .408 Explosive
Bolt: FJX Blast