Vanilla bots may spawn with any of these weapons:
Assaultron: Claws, shock claws, swords, head laser
Mister Handy: sawblade, flamer, claw
Mister Gutsy: vanilla Mr handy, laser
Protectron: laser, auto laser, nail gun, cryo gun, stun claw, cargo claw, normal claw, flamer
Sentry bot: minigun, missile launcher, shoulder mortar launcher

All vanilla bots may drop a factory armor or storage armor piece



Automatron

Mechanist bots:
Swarmbot: all components except melee weapons and Rust Devil armor
Junkbot: all components except Rust Devil armor
Tankbot: all components except Rust Devil armor
Robobrain (basic): custom vanilla limb and armor list, torso components
Robobrain (advanced): all melee and ranged weapons, all armor except Rust Devil armor

All Mechanist bots: Mechanist rare armor


Rust Devil bots:
Assaultron: all melee weapons
Mister Handy: vanilla Mr handy
Protectron: Vanilla protectron
Sentry bot: all melee and ranged weapons

All Rust bots: Rust Devil armor



Robot master lists:
Mechanist master list (MML): General limbs (GL), Ranged weapons (RW), Basic armor (BA), Mechanist rare armor (MRA), Torso components (TC)
Rust Devil master list (RDML): Melee weapons (MW), Rust Devil armor (RDA), Unstable armor (UA)

Vanilla bots:
Assaultron: custom vanilla limb, weapon and armor list.
Mister Handy: custom vanilla limb, weapon and armor list.
Protectron: custom vanilla limb, weapon and armor list.
Sentry bot: custom vanilla limb, weapon and armor list.

Mechanist bots:
Robobrain (basic): custom vanilla limb and armor list, TC
Robobrain (advanced): custom vanilla limb and armor list, MW, RW, MRA, TC
Swarmbot: MML
Junkbot: MW, MML
Scrapbot: MW, MML
Tankbot: MW, UW, MML

Rust Devil bots:
Rust Assaultron: custom vanilla limb list, RDML
Rust Mister Handy: custom vanilla limb list, RW, RDML
Rust Protectron: custom vanilla limb list, RW, RDML
Rust Sentry bot: custom vanilla limb list, RW, RDML



Drop chances:
Vanilla Robots has 
50% chance to drop a limb
40% chance to drop a ranged weapon (Assaultron will not drop ranged weapons)
40% chance to drop a melee weapon (Sentry bot will not drop melee weapons)
60% chance to drop a factory armor piece (including the storage variant)
Sentry bots have 10% penalty (40-30-50%) on account of the violent death explosion
All parts are appropriate for the robot type that drops them

Mechanist bots have 
2 x 50% chance to drop something from the Mechanist master list
20% chance to drop any melee weapon (Swarmbots will not drop melee weapons)
Tankbots have 5% chance to drop an unstable weapon
(this results in 0-15 robot parts + whatever the Automatron script adds)

Mechanist master list has
2 x 40% chance to drop any limb
20% chance to drop any ranged weapon
2 x 40% chance to drop any factory armor (including the storage variant)
20% chance to drop any advanced armor (hydraulic frame or voltaic frame)
5% chance to drop any misc mod (ex hacking module)

Rust Devil bots have 
50% chance to drop a limb
20% chance to drop any ranged weapon (Assaultron will not drop ranged weapons)
2 x 50% chance to drop something from the Rust Devil master list
(this results in 0-10 robot parts + whatever the Automatron script adds)

Rust Devil master list has
20% chance to drop any melee weapon
2 x 30% chance to drop any Rust Devil armor
5% chance to drop any unstable armor (ex Gorgon helm)