Kendachi M-33 Powersword

The Kendachi M-33 Powersword is a melee weapon. Combining elements of the popular Kendachi mono-line with a powered handle, the Powersword vibrates the molecular crystal blade 2000 times per minute. Combined with a microscopically serrated edge, this weapon literally chews its way through anything it encounters, including armor (soft armor SP x 1/4, hard armor SP x 1/2), metal, flesh, and bone.

The blade activates when the handle is gripped, but takes 1 combat turn to warm up. Although the current model is quite heavy (3kg) and fragile (breaks on a fumble, shatters on a parry check of 5 or less on 1d10), Kendachi is currently testing a new model for release in 2022.

Source

 * Blackhand's Street Weapons 2020, p.3