Drop chances

ItemStage 10Stage 50Stage 100Avg count
HiPower 9mm Ammo–96%60%118.53
Shotgun AP Slug (Ammo)–96%93%32.11
HiPower 7.62mm Ammo–96%60%98.49
HiPower .44 Magnum Ammo–80%60%45.49
Steel Arrowhead–22%23%3.03
Buckshot22%22%22%7.88
Bullet Casing22%22%22%7.79
Gunpowder22%22%22%7.87
Bullet Tip22%22%22%7.83
Iron Arrow (Ammo)–16%3.2%2.37
Iron Crossbow Bolt (Ammo)–8.8%3.2%1.29
Steel Spear Parts6.8%8.0%8.5%0.15
Steel Knuckles Parts6.7%8.0%8.2%0.15
Steel Club Parts6.5%7.9%8.1%0.15
Machine Gun Parts6.6%7.8%8.0%0.13
Steel Sledgehammer Parts6.7%7.8%8.5%0.15
Handgun Parts6.5%7.8%8.1%0.13
Rifle Parts6.6%7.8%8.0%0.13
Machete Parts6.7%7.7%8.3%0.15
Bow / Crossbow Parts6.4%7.7%8.1%0.13
Rocket Launcher Parts6.4%7.7%8.0%0.13
Baton Parts6.5%7.7%8.1%0.15
Robotics Parts6.7%7.6%8.0%0.13
Shotgun Parts6.5%7.6%8.0%0.13
modMeleeWoodSplitter3.6%3.9%3.9%0.04
modMeleeGraveDigger3.9%3.9%3.8%0.04
modMeleeWeightedHead3.7%3.9%3.8%0.04
modMeleeSerratedBlade3.8%3.8%3.8%0.04
modMeleeClubBurningShaft3.8%3.8%3.7%0.04
modMeleeFortifyingGrip3.7%3.7%3.7%0.04
modMeleeStructuralBrace3.8%3.6%3.8%0.04
modMeleeClubBarbedWire3.6%3.6%3.7%0.04
modMeleeBunkerBuster3.7%3.6%3.8%0.04
modGunMeleeRadRemover3.4%3.3%3.2%0.03
modGunBowPolymerString2.7%2.9%2.7%0.03
modGunTriggerGroupAutomatic2.6%2.8%2.6%0.03
modMeleeClubMetalChain2.6%2.8%2.7%0.03
modGunScopeLarge2.6%2.7%2.7%0.03
modMeleeIronBreaker2.7%2.7%2.8%0.03
modMeleeDiamondTip2.7%2.7%2.6%0.03
modMeleeErgonomicGrip2.6%2.7%2.7%0.03
modMeleeTemperedBlade2.6%2.5%2.6%0.03
modMeleeClubMetalSpikes2.7%2.5%2.6%0.03
Iron Sledgehammer–1.9%0.45%0.02
Iron Knuckles–1.9%0.45%0.02
Baseball Bat–1.8%0.46%0.02
Iron Spear–1.7%0.50%0.02
Hunting Knife–1.6%0.53%0.02
modGunDrumMagazineExtender1.4%1.4%1.4%0.01
modGunDuckbill1.3%1.4%1.4%0.01
modGunForegrip1.3%1.4%1.3%0.01
modGunMeleeTheHunter1.4%1.4%1.5%0.01
modGunBipod1.3%1.4%1.4%0.01
modGunTriggerGroupSemi1.4%1.4%1.4%0.01
modGunFlashlight1.3%1.4%1.4%0.01
modGunMagazineExtender1.3%1.4%1.3%0.01
modGunMuzzleBrake1.3%1.3%1.3%0.01
modGunChoke1.3%1.3%1.4%0.01
modShotgunSawedOffBarrel1.3%1.3%1.3%0.01
modGunScopeSmall1.4%1.3%1.3%0.01
KV-47 Machine Gun–1.3%0.32%0.01
Robotic Sledge–1.3%0.34%0.01
Pistol–1.3%0.36%0.01
Hunting Rifle–1.2%0.28%0.01
Double Barrel Shotgun–1.2%0.32%0.01
modGunShotgunTubeExtenderMagazine0.99%1.1%0.90%0.01
modGunCrippleEm0.90%1.1%1.0%0.01
modGunTriggerGroupBurst31.1%1.0%1.1%0.01
modGunScopeMedium1.0%1.0%1.0%0.01
modGunRetractingStock0.92%1.0%0.95%0.01
modGunBowArrowRest0.95%0.99%0.92%0.01
modGunSoundSuppressorSilencer0.95%0.98%0.94%0.01
modGunBarrelExtender0.95%0.97%1.1%0.01
modGunLaserSight1.1%0.93%1.0%0.01
modGunReflexSight0.96%0.89%0.96%0.01
Wooden Bow–0.70%0.18%0.01
Molotov Cocktail (Ammo)1.5%0.66%0.17%0.01
Pipe Bomb (Ammo)1.5%0.60%0.17%0.01
Iron Crossbow–0.56%0.15%0.01
7.62mm Ammo98%––0
9mm Ammo98%––0
Shotgun Shell (Ammo)98%––0
Iron Arrowhead22%––0
Knuckle Wraps5.7%––0
Pipe Pistol2.8%––0
Bone Knife5.6%––0
Pipe Baton5.5%––0
Primitive Bow2.9%––0
Pipe Rifle2.9%––0
Pipe Machine Gun3.0%––0
Pipe Shotgun2.9%––0
AP .44 Magnum Ammo––81%0
AP 9mm Ammo––81%0
AP 7.62mm Ammo––81%0
Flaming Arrow (Ammo)––5.7%0
Steel Arrow (Ammo)––5.4%0
Lever Action Rifle––0.55%0
Steel Spear––0.67%0
Flaming Crossbow Bolt (Ammo)––5.5%0
Steel Crossbow Bolt (Ammo)––5.5%0
Stun Baton––0.70%0
Machete––0.63%0
Steel Knuckles––0.67%0
Robotic Turret––0.56%0
Pump Shotgun––0.64%0
.44 Magnum––0.56%0
Tactical Assault Rifle––0.59%0
Grenade (Ammo)––0.26%0
Compound Crossbow––0.27%0
Steel Club––0.59%0
Steel Sledgehammer––0.71%0
Stick of Dynamite (Ammo)––0.23%0
Compound Bow––0.29%0

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