TRexian has released a JTD_Mines 0228 beta addon on the BI Forums.
Finally a beta version of the JTD_mines, which at this point only has a claymore implemented.
Mines that are placeable via the editor, scripting (spawning), and the player. For mines placed by the player, a marker shows the placement. The placed mines can be disarmed, with a small possibility of accidentally discharging the mine. Units that are capable of disarming mines (Engineers and certain special forces) may also be able to pick up disarmed mines. Player-placed mines can be sighted-in, attached to a tripwire, or triggered remotely.