Xbox360Achievements.org - Survival Levels Unlockables

Here is a list of all the unlockables for the survival levels.
Remember you must finish the wave to get the reward for that level. i.e. to unlock the wave 20 reward you must get to wave 21.
These are just the unlockable items, not the random loot items you can get from loot boxes.

Hospital Survival Rewards

Wave 5 80-UNC3 Indirect MG Level 10 Machine Gun
Wave 10 L4-2Y "Hot Shot" Level 10 Shotgun
Wave 15 L4-2Y "Hyper" Sniper Level 10 Sniper Cannon
Wave 20 Shred Machine Gun Turret Level 10 Light Turret
Wave 25 GL-V "Cluster Thruster" Level 10 Grenade Launcher
Wave 30 Dampening Coil Cannon Level 10 Artillery Cannon
Wave 35 Coil Mortar Turret Level 10 Heavy Turret
Wave 40 R-GNS - Lazio Device Level 10 Broadcaster
Wave 45 Scrubs Level 10 Outfit
Wave 50 Medical Mirror Level 10 Hat

Swamp Survival Rewards

Wave 5 L-2 "Faster Blaster" Level 15 Machine Gun
Wave 10 B0-7T6 The Hole Puncher Level 16 Grenade Launcher
Wave 15 M3200 Advanced Spurt Rifle Level 16 Sniper Cannon
Wave 20 Piercing Sniper Turret Level 16 Heavy Turret
Wave 25 Admiral Archie Level 16 Machine Gun
Wave 30 Camo Shotgun Turret Level 15 Light Turret
Wave 35 Explosive Barrel Thrower Level 17 Artillery Cannon
Wave 40 Diamond Plate Paintjob Level 18 Paintjob
Wave 45 Bare Vested Level 18 Outfit
Wave 50 Cowboy Hat Level 19 Hat

Settlement Survival Rewards

Wave 5 Muerte Fiesta Numero 6 Level 15 Shotgun
Wave 10 Albert Level 15 Sniper Cannon
Wave 15 Massive Magnet Launcher Level 16 Grenade Launcher
Wave 20 Explosive Barrel Generator Level 15 Heavy Turret
Wave 25 The Boomerang Level 17 Artillery Cannon
Wave 30 Lieutenant Archie Flak Turret Level 16 Light Turret
Wave 35 Good Vibrations Level 18 Broadcaster
Wave 40 Psychic Pswirl Level 20 Paintjob
Wave 45 Smoking Jacket Level 19 Outfit
Wave 50 Fez Level 20 Hat