Feedback for the new gun range can be posted here I guess.
I will make the start with two suggestions.
1. Equipment Point Modifier
Allow us to set the equipment points you can use two three basic modifiers. COOP, Versus and Competitive. That would allow people to create and also test out loadouts for these game modes in a better way.
2. AI Behavior Control
Allow us to set the AI to "passive" or something like that. This would be helpful if you want to test shooting the AI with something, without having to worry about it shooting yourself.