I bought a Barnett Phantom Jr for my son to shoot, and it actually isn't too bad of bow. The red-dot sight leaves a lot to be desired but the bow itself is fairly accurate (nothing close to Excal accuracy) and the 60# draw is surprisingly powerful.
I've shot 2213s I made up for my Phoenix (flat nocks) from it and they work fine as long as distances are short (10-15 yards).
When I bought the bow my dealer told me it was the same stock as the RC 150 (less the length adjusting butt pad) and it could be upgraded to the RC 150 in the future for less than $100., but unfortunately he closed his business.
I may contact Barnett in the future and see if I can buy an RC 150 prod assembly.
Edited to add:
Called Barnett and they said it could NOT be upgraded.
I don't believe them, I think they just don't want to sell the parts for an upgrade when they could possibly sell a new crossbow. The tech admitted it's the same stock, so I see no reason the prod couldn't be changed.
BTW - the trigger on our 60# Phantom Jr is unbelievably sweet! Very light and NO creep!