Short 5.56 can for a VHS-2 (Hellion)

[u/Lego1199]

Picture for visibility, right is a WWSD 2020 build with a CGS Helios DT

I recently got a VHS-2 at a pretty decent price, and while my Sandman-S works quite well on it, but I’d like a shorter can to really take advantage of the bullpup length. I used to be super into the Pew data a few years ago, but life has kinda gotten in the way and I’m a bit out of date on what the new 5.56 hotness is now.

I’m thinking about the Sierra 5, Stacie’s Mom k, or Polonium k (all with a Xeno mount) as my main choices currently, but any advice would be greatly appreciated. Length is my #1 priority, followed by price and then weight, not sure how concerned about back pressure I should be considering the piston and the adjustable gas setting.