This instructable will show you how to build a catapult in GMod.
Step 1: Base
1st spawn a base. it has to be pretty big.
Step 2: Arms
SPawn 2 long stick like props and motor (make the torque at 1000 so it can go far) the them to the center of the base do this on the other side to
Step 3: Holder Thingys
now spawn to props that could be used as a holding bin. easy weld them to the pillars.
Step 4: Ropes
get the holders into this position and rope the bottom to the ground
Step 5: Projectiles
spawn some bouncy balls in the bins and ignite them
Step 6: Hit the Launch Buttons
do it just press the button that is set as your forward