Drop chances

ItemStage 10Stage 50Stage 100Avg count
HiPower 7.62mm Ammo–58%22%24.18
Shotgun AP Slug (Ammo)–58%53%8.21
HiPower 9mm Ammo–58%23%29.36
Bullet Tip44%44%44%26.34
Gunpowder44%44%44%26.28
Bullet Casing43%44%43%26.34
Buckshot44%44%44%26.42
HiPower .44 Magnum Ammo–36%22%11.28
Steel Knuckles Parts1.9%3.5%3.7%0.09
Baton Parts1.9%3.4%3.7%0.08
Steel Spear Parts1.7%3.4%3.8%0.08
Steel Club Parts1.8%3.4%3.9%0.08
Machete Parts1.8%3.3%3.7%0.08
Steel Sledgehammer Parts1.8%3.3%3.7%0.08
Bow / Crossbow Parts1.9%3.3%3.5%0.06
Robotics Parts1.7%3.2%3.5%0.06
Rifle Parts1.8%3.2%3.5%0.06
Rocket Launcher Parts1.8%3.2%3.6%0.06
Shotgun Parts1.9%3.1%3.5%0.06
Handgun Parts2.0%3.1%3.5%0.06
Machine Gun Parts1.9%3.1%3.5%0.06
Hunting Knife–1.8%0.48%0.02
Iron Spear–1.8%0.47%0.02
Baseball Bat–1.8%0.53%0.02
Iron Sledgehammer–1.8%0.46%0.02
Iron Knuckles–1.8%0.50%0.02
Hunting Rifle–1.3%0.33%0.01
Double Barrel Shotgun–1.3%0.33%0.01
Pistol–1.3%0.37%0.01
KV-47 Machine Gun–1.2%0.33%0.01
Robotic Sledge–1.2%0.34%0.01
Molotov Cocktail (Ammo)1.5%0.68%0.16%0.01
Iron Crossbow–0.65%0.15%0.01
Wooden Bow–0.64%0.17%0.01
Pipe Bomb (Ammo)1.5%0.60%0.17%0.01
modMeleeStructuralBrace0.44%0.47%0.47%0
modMeleeSerratedBlade0.42%0.45%0.38%0
modMeleeWoodSplitter0.49%0.43%0.44%0
modMeleeBunkerBuster0.37%0.43%0.40%0
modMeleeFortifyingGrip0.40%0.39%0.40%0
modMeleeClubBurningShaft0.41%0.38%0.40%0
modMeleeClubBarbedWire0.42%0.37%0.41%0
modGunMeleeRadRemover0.34%0.36%0.32%0
modMeleeWeightedHead0.47%0.36%0.47%0
modGunTriggerGroupAutomatic0.33%0.35%0.37%0
modMeleeGraveDigger0.41%0.35%0.43%0
modMeleeClubMetalSpikes0.30%0.32%0.27%0
modMeleeErgonomicGrip0.28%0.31%0.30%0
modGunScopeLarge0.30%0.30%0.31%0
modMeleeTemperedBlade0.29%0.30%0.30%0
modMeleeIronBreaker0.30%0.29%0.26%0
modGunBowPolymerString0.30%0.29%0.32%0
modMeleeClubMetalChain0.27%0.28%0.25%0
modMeleeDiamondTip0.31%0.27%0.27%0
modGunDrumMagazineExtender0.15%0.21%0.22%0
modGunMuzzleBrake0.19%0.17%0.17%0
modGunBipod0.12%0.17%0.13%0
modGunTriggerGroupSemi0.17%0.16%0.15%0
modGunChoke0.14%0.16%0.14%0
modGunForegrip0.15%0.15%0.13%0
modShotgunSawedOffBarrel0.14%0.14%0.13%0
modGunFlashlight0.17%0.14%0.13%0
modGunTriggerGroupBurst30.11%0.13%0.07%0
modGunScopeMedium0.12%0.13%0.12%0
modGunMeleeTheHunter0.17%0.13%0.14%0
modGunMagazineExtender0.18%0.13%0.14%0
modGunDuckbill0.12%0.13%0.16%0
modGunScopeSmall0.16%0.12%0.15%0
modGunReflexSight0.11%0.12%0.12%0
modGunBowArrowRest0.14%0.12%0.14%0
modGunSoundSuppressorSilencer0.12%0.11%0.09%0
modGunShotgunTubeExtenderMagazine0.12%0.11%0.11%0
modGunCrippleEm0.11%0.10%0.12%0
modGunBarrelExtender0.12%0.10%0.12%0
modGunLaserSight0.09%0.09%0.11%0
modGunRetractingStock0.11%0.07%0.13%0
7.62mm Ammo66%––0
9mm Ammo66%––0
Shotgun Shell (Ammo)66%––0
Primitive Bow2.9%––0
Knuckle Wraps5.9%––0
Pipe Pistol3.1%––0
Pipe Rifle3.0%––0
Pipe Baton5.8%––0
Bone Knife6.0%––0
Pipe Machine Gun3.1%––0
Pipe Shotgun3.1%––0
AP 7.62mm Ammo––37%0
AP 9mm Ammo––37%0
AP .44 Magnum Ammo––37%0
.44 Magnum––0.56%0
Steel Spear––0.68%0
Stun Baton––0.71%0
Steel Club––0.70%0
Steel Sledgehammer––0.65%0
Lever Action Rifle––0.61%0
Pump Shotgun––0.63%0
Stick of Dynamite (Ammo)––0.22%0
Steel Knuckles––0.62%0
Compound Crossbow––0.28%0
Machete––0.55%0
Robotic Turret––0.57%0
Tactical Assault Rifle––0.64%0
Rocket Frag (Ammo)––0.07%0
Compound Bow––0.32%0
Grenade (Ammo)––0.25%0
Rocket HE (Ammo)––0.05%0

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