Drop chances

ItemStage 10Stage 50Stage 100Avg count
Steel Arrowhead–13%13%1.02
Bullet Tip13%13%13%2.99
Gunpowder13%13%13%2.99
Bullet Casing13%13%13%2.97
Buckshot13%13%13%2.91
HiPower 9mm Ammo–11%3.4%1.16
Iron Arrow (Ammo)–11%1.9%0.82
HiPower 7.62mm Ammo–11%3.4%1
Shotgun AP Slug (Ammo)–10%8.8%0.48
HiPower .44 Magnum Ammo–5.8%3.3%0.45
Iron Crossbow Bolt (Ammo)–5.8%2.0%0.44
Robotics Parts0.70%0.81%0.90%0.01
Rocket Launcher Parts0.64%0.81%0.84%0.01
Handgun Parts0.63%0.81%0.83%0.01
Baton Parts0.67%0.78%0.74%0.01
Shotgun Parts0.68%0.78%0.81%0.01
Steel Sledgehammer Parts0.68%0.76%0.81%0.01
Bow / Crossbow Parts0.61%0.75%0.74%0.01
Machine Gun Parts0.67%0.75%0.80%0.01
Steel Spear Parts0.69%0.75%0.80%0.01
Machete Parts0.57%0.73%0.75%0.01
Steel Knuckles Parts0.62%0.73%0.75%0.01
Rifle Parts0.62%0.72%0.84%0.01
Steel Club Parts0.64%0.72%0.77%0.01
modMeleeStructuralBrace0.38%0.41%0.41%0
modMeleeBunkerBuster0.40%0.39%0.40%0
modMeleeGraveDigger0.37%0.39%0.38%0
modMeleeWoodSplitter0.35%0.38%0.38%0
modMeleeSerratedBlade0.40%0.37%0.39%0
modMeleeWeightedHead0.36%0.36%0.36%0
modMeleeClubBurningShaft0.39%0.35%0.35%0
modGunMeleeRadRemover0.34%0.32%0.29%0
modMeleeClubBarbedWire0.32%0.32%0.35%0
modMeleeFortifyingGrip0.38%0.31%0.30%0
modGunScopeLarge0.29%0.27%0.27%0
modMeleeDiamondTip0.26%0.27%0.27%0
modMeleeErgonomicGrip0.26%0.27%0.28%0
modMeleeTemperedBlade0.23%0.26%0.25%0
modMeleeIronBreaker0.28%0.26%0.25%0
modMeleeClubMetalSpikes0.25%0.26%0.25%0
modGunTriggerGroupAutomatic0.28%0.24%0.26%0
modGunBowPolymerString0.24%0.24%0.24%0
modMeleeClubMetalChain0.26%0.22%0.26%0
Baseball Bat–0.20%0.05%0
modGunMeleeTheHunter0.17%0.17%0.16%0
Iron Spear–0.17%0.05%0
KV-47 Machine Gun–0.16%0.04%0
modGunBipod0.16%0.15%0.14%0
modGunDrumMagazineExtender0.13%0.15%0.16%0
modShotgunSawedOffBarrel0.14%0.14%0.14%0
modGunDuckbill0.14%0.14%0.17%0
Iron Knuckles–0.14%0.03%0
Hunting Knife–0.14%0.04%0
Iron Sledgehammer–0.14%0.04%0
Robotic Sledge–0.14%0.03%0
modGunScopeSmall0.13%0.13%0.14%0
modGunTriggerGroupBurst30.12%0.13%0.11%0
modGunReflexSight0.10%0.13%0.10%0
modGunMagazineExtender0.14%0.13%0.14%0
modGunShotgunTubeExtenderMagazine0.12%0.13%0.12%0
modGunFlashlight0.11%0.12%0.13%0
modGunMuzzleBrake0.10%0.12%0.13%0
modGunForegrip0.10%0.12%0.12%0
modGunChoke0.14%0.12%0.12%0
Pistol–0.12%0.01%0
modGunTriggerGroupSemi0.10%0.11%0.12%0
modGunCrippleEm0.06%0.11%0.10%0
modGunLaserSight0.10%0.10%0.10%0
Hunting Rifle–0.10%0.03%0
Pipe Bomb (Ammo)0.14%0.09%0.02%0
modGunSoundSuppressorSilencer0.07%0.09%0.07%0
Double Barrel Shotgun–0.09%0.04%0
modGunScopeMedium0.08%0.08%0.10%0
modGunRetractingStock0.10%0.08%0.07%0
modGunBarrelExtender0.09%0.08%0.09%0
modGunBowArrowRest0.08%0.07%0.08%0
Iron Crossbow–0.07%0.04%0
Molotov Cocktail (Ammo)0.12%0.06%0.01%0
Wooden Bow–0.05%0.01%0
Shotgun Shell (Ammo)18%––0
Iron Arrowhead13%––0
7.62mm Ammo18%––0
9mm Ammo18%––0
Pipe Shotgun0.29%––0
Pipe Pistol0.26%––0
Pipe Baton0.51%––0
Pipe Rifle0.29%––0
Pipe Machine Gun0.30%––0
Knuckle Wraps0.54%––0
Bone Knife0.51%––0
Primitive Bow0.33%––0
AP .44 Magnum Ammo––5.7%0
AP 9mm Ammo––5.8%0
Steel Arrow (Ammo)––3.7%0
Steel Crossbow Bolt (Ammo)––3.4%0
Flaming Crossbow Bolt (Ammo)––3.5%0
Flaming Arrow (Ammo)––3.6%0
AP 7.62mm Ammo––5.8%0
.44 Magnum––0.07%0
Pump Shotgun––0.05%0
Machete––0.06%0
Steel Sledgehammer––0.08%0
Tactical Assault Rifle––0.05%0
Stun Baton––0.07%0
Steel Spear––0.06%0
Steel Knuckles––0.06%0
Steel Club––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.