First line gear- 2 different methods of starting a fire, knife, water, water purification means, signalling device handgun and at least 2 complete reloads for it. Some fishing line and hooks if you are someplace with streams or water or you can use the line for snares. A tin cup is nice to add also
Second line gear- 1 days rations, small first aid kit, more water, an axe or machete, rifle or shotgun with 20 rounds, 50 para cord. A small frying pan is a bonus.
Third line gear 10 days rations, larger more complete first aid kit, flashlight with spare batteries, shovel, rifle or shotgun with 100 rounds, tarp sleeping bag and tent.
Most importantly use your head, be familiar with your gear, check those items before you go in the field.
First line is with you, second line can be close by and third line is in your vehicle or very close by you can get to with your first line gear if needed.