Simon at Mad Bull Airsoft has posted shots of the 3d prototype version of an Airsoft mine that he’s working on (more details can be seen here). The device will just vent gas (no BBs) about as high as your waist when activated, with a planned retail price of around 20USD:
After several discussion on the forum, we decide to produce this low power (can’t shoot out B.B.) + lot smoke (baby powder) + loud land mine.
We estimate the smoke will only reach to your knees.
Moreover, the retail price will be around $20…..
The following is the proto-type “print out” by RP. Simon, (Mad Bull Airsoft)