What choke for a Mossberg 510 Mini

[KyTurkeyHunter473]

I recently purchased a Mossberg 510 mini. I am debating on which choke tube to get. The gun is primarily for my son so I am looking for a good even 30 yard pattern.  I'm leaning towards the Primos Tightwad, Hevi-Shot choke tube or maybe an Indian Creek. He will be shooing Hevi 6s or 7s.  Any input would be appreciated.