There was a Helion for sale recently in the classifieds. Not sure why unless you just can't get used to a bullpup.I prefer the bullpup platform.
They are SBR short, without the need for tax stamps.
A bullpup in 5.56 -loaded with varmint rounds is an excellent short range weapon. It will limit overpenetration as the 5.56/.223 in a 16” or longer barrel will fragment and lose energy quickly. That also creates a wound cavity that will often stop most threats with one shot ( if placed correctly). They’re also good up to 600 yards. Just in case.
Since Maryland has the stupid 29” minimum OAL rule. The 26” bullpup is banned. But you can still get bullpups with longer barrels or permanently attached muzzle extensions to meet the 29” rule.
The 20” MDRX, 20” Keltec RDB , Tavor x95 are okay. Then there is the SA Helion with a 16” bbl that is MD legal.
If I were to get one now. I’d get the Helion