"While the M2 shows that the company’s haptic tech can scale up to something as large as a .50 caliber machine gun, Holly says that it can also go much smaller, down to the size of a handgun. Indeed, the company is currently at work on a simulator for the M4 carbine, an assault rifle widely used in the US Army and Marine Corps, and thus widely used in existing training simulations."
https://www.roadtovr.com/haptech-electromagnetic-recoil-haptics-military-vr-training/
https://www.roadtovr.com/haptech-electromagnetic-recoil-haptics-military-vr-training/