Combine the indicated items to create the corresponding weapon. Note: The blueprint locations may vary.

Weapon	How to unlock
Acid Jar	Chemicals + Household Cleaner; blueprint found at frozen storage (farms) in South Almuda.
Acid Rain	Flare Gun + Chemicals; blueprint awarded for completing Chapter 04.
Acid Toy	Chemicals + Toy Robot; blueprint found at Sculpt Yourself store in Central City.
Beer Hat	Construct Hat + Keg; blueprint awarded for unlocking the Food Mechanic upgrade.
BlamBow	Roman Candle + Crossbow; blueprint found at power plant in South Almuda.
Bomb Toy	Robot Bear + Gasoline Canister; blueprint found at Burgess-Dawson building in Central City.
Boom Bear	Freedom Bear + Dynamite; blueprint found at tennis court (mansions) in Sunset Hills.
Boom Cannon	Shotgun + Grenade; blueprint found at illegals hideout in Sunset Hills.
Boomer Axe	Hub Cab + Hatchet; blueprint found at Ingleton taxi depot in South Almuda.
Car Bomb	RC Car + Grenade; blueprint found at family houses in Sunset Hills.
Chest Beam	Microwave + Motorcycle Engine; blueprint found at Museum of the Americas in Central City.
Chop'N'Talk	Game Console + Battleaxe; blueprint found at barber shop roof in Ingleton.
Chopper	Fire Axe + Hatchet; blueprint found at Roof adjacent to illegals hideout in South Ingleton.
Chuck Axe	Harpoon Gun + Fire Axe; blueprint found at Museum of the Americas in Central City.
Cuddly Bear	Freedom Bear + Portable Stereo; blueprint found at toy store roof (near karaoke bar) in Sunset Hills.
Death Mask Reaper	Grim Reap + Reaper Mask; blueprint found at shack roof (near gun store or southern safehouse) in Ingleton.
Decoy Bear	Cuddly Bear + Wheelchair; blueprint found at rooftop (near tennis court) in Sunset Hills.
Defiler	Fire Axe + Sledgehammer; blueprint found at house construction site in Sunset Hills.
Dragon Punch	Boxing Gloves + Motorcycle Engine; blueprint found at Sunny Luck Fortune in Southern Ingleton.
DynaMeat	Dynamite + Hunk of Meat; blueprint found at workbench in warehouse C-114 at plane hangar (Chapter 02).
Electric Chair	Wheelchair + Battery; blueprint found at Meryl's home in Sunset Hills.
Electric Crusher	Sledgehammer + Battery; blueprint found at cemetery sewers area in Ingleton.
Electric Rake	Leaf Rake + Battery; blueprint found at train repair station in South Almuda.
Explosive Chair	Wheelchair + Dynamite; blueprint found at central courts area in Central City.
Fighting Gloves	Game Console + Toy Gun; blueprint found at Slappy's Toy Store in Sunset Hills.
Fire Arrows	Motor Oil + Crossbow; blueprint found at strip club in Ingleton.
Fire Reaper	Grim Reaper + Gasoline Canister; blueprint found at sword store (near burger restaurant) in Ingleton.
Flame Mecha Dragon	Mecha Dragon + Firecrackers; blueprint found at northwestern houses in Ingleton.
Flamethrower	Leaf Blower + Cooking Oil; blueprint found at Wrench-O-Rama DIY Store in Ingleton.
Flaming Gloves	Motor Oil + Boxing Gloves; blueprint found at collector's house in Sunset Hills.
Flaming Helmet	Motor Oil + Dragon Head; blueprint found at Zen Temple (Chinese Opera) in Southern Ingleton.
Flaming Sword	Motor Oil + Broadsword; blueprint found at locker in Sunset Hills High School.
Freedom Bear	Robot Bear + LMG; blueprint found at Sunset Ties (adjacent rooftop) in Sunset Hills.
Glove Gun	Cardboard Cutout + Pogo Stick; blueprint found at bus depot in South Almuda.
Grim Reaper	Scythe + Katana; blueprint found at fenced area (near sewer entrance) in Ingleton.
Hail Mary	Football + Grenade; blueprint found at Package Force Delivery Company in Ingleton.
Heavy Metal	2×4 + Lead Pipe; blueprint found at bus roof or Rhonda's garage in Ingleton.
Helmet Bomb	Afro Wig + Dynamite; blueprint found at Felicia Building in Central City.
I.E.D.	Propane Tank + Gasoline Canister; blueprint found at church chapel in Ingleton.
Iron Edge	Metal Cleaver + Machete; blueprint found at church in Ingleton.
Jack in the Box	Cardboard Box + Toy Robot; blueprint found at Rhonda's Garage in Ingleton.
Jazz Hands	Handgun + MMA Gloves; blueprint found at Bibi's Box in Sunset Hills.
Junk Ball	Outdoor Trash Can + Garbage Bag; blueprint found at Crystal of the Sea in Central City.
Knife Gloves	Wheelchair + Battery; blueprint found at Meryl's home in Sunset Hills
Laser Sword	Flashlight + Gems; blueprint found at underground parking lot in Central City.
Mauler	Katana Sword + Machete; blueprint found at Museum of the Americas in Central City.
Mecha Dragon Blade	Mecha Dragon + Katana; blueprint found at shack roof (near sewer entrance) in Ingleton.
Mecha Dragon	Dragon Head + Parasol; blueprint found at Zen Dragon Temple courtyard in Ingleton.
Metal Mary	Bowie Knife + Football; blueprint found at cemetery sewer entrance in Ingleton.
Mini Chainsaw	Metal Cleaver + Chainsaw; blueprint rewarded for completion of Craven Consult sidequest.
Napalm Bomb	Motor Oil + Propane Tank; blueprint awarded for completing Chapter 03.
Party Gloves	Toy Robot + Boxing Gloves; blueprint found at toy store (north of Food Fun Shack) in Sunset Hills.
Pole Weapon	Spear + Hat Rack; blueprint found at motel hideout in Ingleton.
Pukes 'o' Hazard	Lead Pipe + Chemicals; blueprint found at collector's house in Sunset Hills.
Pummel Blast	Sledgehammer + Grenade; blueprint found at warehouses in South Almuda.
Remote Detonator	Dynamite + Laptop; blueprint found at central illegals hideout in Sunset Hills.
Roaring Thunder	Battery + Blanka Mask; blueprint found at Food Fun Shack in South Sunset Hills.
Rocket Punch	Boxing Gloves + Acetylene Torch; blueprint found at taxi depot in Ingleton.
Sabre Shot	Sawed-Off Shotgun + Machete; blueprint found at quarantine area exterior in Sunset Hills.
Sentry Cat	LCD Monitor + Keg; blueprint found at viaduct.
Shocking Touch	Battery + MMA Gloves; blueprint found at Robsaka Digital in Central City.
Slapper	Broom + Boxing Gloves; blueprint location unknown.
Sledge Saw	Sledgehammer + Cement Saw; blueprint found at diner in Chapter 00 (Prologue).
Spiked Bat	Baseball Bat + Box of Nails; blueprint found at northwestern home exterior in Ingleton.
Spiked Bucket	Meat Cleave + Bucket; blueprint found at Big Bulls Butchery in Ingleton.
Split Shot	Assault Rifle + Lead Pipe; blueprint found at taxi company in Ingleton.
Sticky Bomb	Scissors + Grenade; blueprint found at taxi company depot in Ingleton.
Super Crossbow	Motorcycle Engine + Crossbow; blueprint found at central storage in Sunset Hills.
Super Massager	Massager + Leaf Blower; blueprint found at strip club (second floor, near the bus station) in Almuda.
Tactical Handgun	Flashlight + Handgun; blueprint awarded for completing Chapter 00 (Prologue).
Tenderizers	MMA Gloves + Car Exhaust; blueprint found at boxing gymnasium in Ingleton.
The Slapper	Boxing Gloves + Broom; blueprint found at Uno Grande in South Almuda.
Ultimate Grim Reaper	Death Mask Reaper + Gasoline Canister; blueprint found at playground in Ingleton.
Weapon Cart	Shopping Cart + Pitchfork; blueprint found at access tunnel (between subway station and warehouse) in Sunset Hills.
Z.A.R.	Shotgun + Assault Rifle; blueprint found at central police station in Chapter 03.
Zombie Raker	Katana Sword + Leaf Rake; blueprint found at Los Perdidos Communications Company in Sunset Hills.