I currently have a 16" 350 Legend rifle and love the round.  It's a carbine gas and runs great with any hunting ammo (170 grains plus) but tends to choke on the 124-130gr FMJ rounds.
Probably need to open the gas port but instead I'm thinking about running a short barrel with my 9mm suppressor on my SBR lower.
It currently has M4 feed ramps and I know that can be an issue so I may grind and polish it to a single feed ramp, but before I do that I'm thinking about just getting another barrel and selling this one.

I will pair this build with an adjustable gas block but most likely only run it suppressed.

Any recommendations on barrels?  I see Odin offers a 10.5" with carbine gas and 1:10 twist and it comes with an adjustable gas block!  I would have to modify the M4 feed ramps to a single feed ramp.
Any other barrels I should be looking at as well?

do some research before you go single feed ramp. 350 Legend is still a high pressure round. I have a Mos-tek and really like it but they are not the only game in town.