The GEMSS mine system (Ground Emplaced Mine Scattering System) was a US

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 mine system, replaced in US service by the Volcano mine system

Volcano mine system

The M139 Volcano mine system is a US highspeed landmine laying system. It can lay a minefield one kilometer long, containing 960 mines in 43 seconds from a ground vehicle, and in just 17 seconds from a helicopter...

. The mines are deployed from either the towed M128 "Frisbee Flinger" and the M138 "Flipper" portable mine layer.

Mines

The system consists of two mines, the M74 and M75, that are similar to the mines used in the GATOR mine system

GATOR mine system

The GATOR mine system is a US system of air-dropped anti-tank and anti-personnel mines, that was developed in the 1980s to be compatible with existing cluster dispensers. It is used with two dispenser systems — the Navy 500 lb CBU-78/B and the Air Force 1,000 lb CBU-89/B...

but without the "aeroballistic" casing. The M74 is an anti-personnel mine and the M75 is an anti-tank mine. There is also an M79 inert practice mine.

Model	Type	Weight	Diameter	Height
M74	anti-personnel	1.4 kg	119 mm	66 mm
M75	anti-tank	1.7 kg	119 mm	66 mm
M79	practice	1.6 kg	119 mm	66 mm

M128 towed minelayer

The M128 towed minelayer is fitted to a modified M794 trailer. The dispenser takes up to 20 minutes to reload and carries 800 mines, which it can dispense at 2 mines per second. Empty it weighs 4,773 kg, loaded it weighs 6,364 kg. It entered service 1986.

M138 flipper minelayer

The M138 is a portable mine dispenser, that entered service in 1991 and was designed to supplement the M128. It can be mounted on any vehicle in about 10 minutes. It can throw a mine 20 to 30 meters every 10 seconds. The complete unit weighs 55 kg.