So its a factory k length barrel, an HBI k length handguard and a Maticore arms/SBTactical collapsing brace...
Starting from scratch the package deal is worth it keep in mind thats msrp. They still msrp the standard pistol length evo at $899 and you can find them as low as $600.
All of these items can be purchased separately by current evo owners.
The brace is made by Manticore for SBTactical and is releasing soon.
You can have your barrel cut down to K length or buy a pre made for around $100
And The HBI k-length handguard has been out for 2 years
Only thing else I see is the muzzle device. But there are far better options around and more and more companies are making 1/2x28 threaded 9mm muzzle devices as time goes on, anywhere from $15 steel birdcage style up to $200 titanium high end you can get whatever muzzle device you want