I just got this on my first Mag, but I decided I wanted to use a powerfeed body with a warp instead. These are all in great condition, and the barrel itself is brand new. These funds are in USD and does not include shipping from Canada. These are all OBO, of course.
Center Feed Freak Back - $50 - New (only test fitted on marker)
12" All American Front (Black) - $20 - Brand New
0.693 Freak Insert - $10 - Lightly Used
This is the picture from the auction where I got the marker. I can get better pictures if needed.
If someone wants to take the entire barrel system, I can do $70 + Shipping for the works.