Drop chances

ItemStage 10Stage 50Stage 100Avg count
HiPower 9mm Ammo–21%6.3%2.2
HiPower 7.62mm Ammo–20%6.3%1.9
Shotgun AP Slug (Ammo)–20%17%0.95
Iron Arrow (Ammo)–20%3.7%1.54
HiPower .44 Magnum Ammo–11%6.5%0.86
Iron Crossbow Bolt (Ammo)–11%3.8%0.87
Buckshot3.3%3.3%3.3%0.75
Bullet Tip3.1%3.2%3.2%0.73
Bullet Casing3.1%3.1%3.1%0.71
Gunpowder3.2%3.1%3.1%0.7
Steel Arrowhead–3.0%3.1%0.23
Steel Knuckles Parts0.66%0.85%0.84%0.02
Machete Parts0.67%0.81%0.84%0.02
Rifle Parts0.63%0.79%0.79%0.01
Steel Sledgehammer Parts0.72%0.79%0.83%0.01
Rocket Launcher Parts0.69%0.79%0.80%0.01
Steel Spear Parts0.72%0.78%0.85%0.01
Handgun Parts0.62%0.77%0.81%0.01
Machine Gun Parts0.68%0.76%0.81%0.01
Robotics Parts0.61%0.75%0.78%0.01
Bow / Crossbow Parts0.64%0.74%0.76%0.01
Baton Parts0.64%0.73%0.77%0.01
Steel Club Parts0.56%0.73%0.74%0.01
Shotgun Parts0.59%0.72%0.74%0.01
modMeleeStructuralBrace0.40%0.43%0.41%0
modMeleeGraveDigger0.45%0.43%0.43%0
modMeleeWeightedHead0.38%0.40%0.38%0
modMeleeWoodSplitter0.37%0.37%0.38%0
modMeleeBunkerBuster0.33%0.35%0.33%0
modMeleeFortifyingGrip0.35%0.35%0.35%0
modMeleeClubBurningShaft0.32%0.35%0.34%0
modGunMeleeRadRemover0.35%0.33%0.36%0
modMeleeSerratedBlade0.36%0.33%0.36%0
modMeleeClubBarbedWire0.32%0.31%0.31%0
modMeleeClubMetalChain0.29%0.29%0.28%0
modMeleeErgonomicGrip0.26%0.27%0.25%0
modMeleeTemperedBlade0.27%0.26%0.25%0
modGunTriggerGroupAutomatic0.25%0.26%0.24%0
modMeleeIronBreaker0.24%0.26%0.26%0
modMeleeClubMetalSpikes0.28%0.25%0.30%0
modMeleeDiamondTip0.25%0.23%0.22%0
modGunScopeLarge0.21%0.21%0.20%0
modGunBowPolymerString0.22%0.21%0.24%0
Iron Sledgehammer–0.20%0.04%0
Iron Spear–0.19%0.05%0
modGunMagazineExtender0.15%0.16%0.14%0
modGunBipod0.13%0.16%0.14%0
Hunting Knife–0.16%0.03%0
Iron Knuckles–0.16%0.04%0
modGunScopeSmall0.13%0.14%0.12%0
modGunFlashlight0.14%0.14%0.15%0
modGunChoke0.12%0.14%0.13%0
modGunTriggerGroupSemi0.12%0.14%0.13%0
Hunting Rifle–0.14%0.03%0
modGunMuzzleBrake0.13%0.13%0.14%0
modGunDrumMagazineExtender0.12%0.13%0.13%0
KV-47 Machine Gun–0.13%0.03%0
Double Barrel Shotgun–0.13%0.04%0
modGunForegrip0.11%0.12%0.11%0
modShotgunSawedOffBarrel0.11%0.12%0.14%0
modGunMeleeTheHunter0.13%0.12%0.12%0
Pistol–0.12%0.04%0
Baseball Bat–0.12%0.03%0
Robotic Sledge–0.12%0.03%0
modGunBowArrowRest0.12%0.11%0.12%0
modGunLaserSight0.10%0.10%0.12%0
modGunBarrelExtender0.09%0.10%0.09%0
modGunTriggerGroupBurst30.12%0.10%0.09%0
modGunRetractingStock0.12%0.10%0.09%0
modGunScopeMedium0.08%0.10%0.09%0
modGunShotgunTubeExtenderMagazine0.09%0.10%0.10%0
modGunDuckbill0.09%0.09%0.09%0
modGunCrippleEm0.11%0.09%0.09%0
modGunReflexSight0.09%0.08%0.08%0
modGunSoundSuppressorSilencer0.08%0.08%0.07%0
Wooden Bow–0.07%0.01%0
Pipe Bomb (Ammo)0.17%0.06%0.01%0
Molotov Cocktail (Ammo)0.10%0.05%0.01%0
7.62mm Ammo34%––0
9mm Ammo35%––0
Shotgun Shell (Ammo)34%––0
Primitive Bow0.28%––0
Iron Arrowhead3.0%––0
Knuckle Wraps0.52%––0
Pipe Baton0.58%––0
Pipe Machine Gun0.27%––0
Pipe Shotgun0.27%––0
Bone Knife0.54%––0
Pipe Pistol0.25%––0
Pipe Rifle0.30%––0
AP .44 Magnum Ammo––11%0
AP 7.62mm Ammo––11%0
Flaming Arrow (Ammo)––6.5%0
Steel Crossbow Bolt (Ammo)––6.7%0
AP 9mm Ammo––11%0
Steel Arrow (Ammo)––6.8%0
Flaming Crossbow Bolt (Ammo)––6.8%0
Steel Spear––0.07%0
Tactical Assault Rifle––0.05%0
Steel Club––0.05%0
Robotic Turret––0.07%0
Steel Sledgehammer––0.07%0
Steel Knuckles––0.09%0
Machete––0.08%0
Lever Action Rifle––0.05%0
Stun Baton––0.07%0

Average count per open at loot stage 50. From 40,000 simulated opens per stage; perks that raise loot are not counted.