Army Tests Mechanical 'Third Arm' to Ease Weapon Weight
Military.com 1 Jun 2018 By Matthew Cox
Army Research Lab engineers released a video recently showing a soldier running, diving and handling weapons attached to a prototype mechanical arm designed to help reduce the felt weight of carbines and machine guns.
The "third arm" is essentially a multi-joint, stabilizing appendage that attaches to the weapon and the soldier's waist belt to take the weight off the service member's arms and distribute it more evenly on the body, Dan Baechle, ARL mechanical engineer, said in a recent Army press release.
https://www.military.com/kitup/2018/06/01/army-tests-mechanical-third-arm-ease-weapon-weight.html