Magic Monkey Shooter (2D Trajectory Problem Solving) by mhockenbrock

K'nex Fully Automatic Burst Rifle: The K-2 v.2 by Kinetic

Solder Dispenser by bfk

Knex Folding Target Range by cazadactle

Knex Gun: The Kinetic Rifle by Kinetic

Knex Anti-Material Crossbow by KnexFreak360

The First fully automatic, clip fead, LEGO Nerf gun: Rapt… by Raptor Z

Dry-Ice Smoke Ring Cannon! (No fog machine necessary) by ramicaza

Self Contained Pneumatic T-Shirt Cannon by Meico

Giant Ammo Prop by hackmattr

Functional Steampunk Airsoft Pistol by ilpug

Howitzer Potato Cannon by Flagella

How to Make a Full Auto Airsoft Minigun [Halo Inspired Mo… by NightHawkInLight

Tar and feather gun by PenfoldPlant

Paintball Guitar Case by field

Elasto-O-Matic RBG-5 - Binder Launcher by Greasetattoo

Plasma-powered Death Ray by Bindlestiff