Force N Force is a brand under ATK Speer LE that deals in training and simulation rounds. Their range of 9mm training cartridges comes in blanks and marking and unmarking. The marking rounds utilize a glycerine-base which easily cleans off surfaces and clothing.
They also manufacture their own drop-in bolts for AR-15 style rifles along with 5.56 training ammunition. This training ammo also works with simulation rifles.
All their cartridges are primer only, which reduces report and introduces no fouling to the firearm. Force N Force ammunition also has a 1 ft safety distance for all ammo.