Millions of American soldiers have been through the same deal, and they have no problem kicking ass, where ass needs to be kicked.
Catch as catch can. You got what you felt you NEEDED now, what was available at the time. Sometime in the future, you can get what you want.
Both acceptable choices, some may even say excellent. Neither gun is badly made.
First choice, a used (yes used) pre-remlin 870 or Wingmaster. Second choice, Mossberg 500. Both can be configured for HD or clay shooting, and switched back and forth with very little work.