THIS GRENADE IS REUSABLE!
This is a Genuine pin pull Smoke grenade tutorial for airsoft, paintball or reenactment. Roughly based on an M67 Design, however you can use the system to make any type, shape you desire. Even use the mechanism for trip wire ignition of smoke bombs.
The Smoke pellets I use can be bought at a plumbers merchant. The 9 gram ones each give out approximately 15 cubic meters of smoke and burn for around 60 seconds. The Fuse and cardboard Hemispheres are available from firework stockists.