Although they share a name, one is a modern take on an old idea and the other is well, just plain different.
The Pistol Bayonet from LaserLyte in conjunction with Ka-Bar knives evokes memories of childhood visits to museums featuring such oddities as muzzle loading pistols festooned with saber-style blades under the barrel. Pistols have been sporting rails for quite awhile now so I guess it was really only a matter of time before someone attached a blade. The 2.75 inch blade fits on medium to large pistols with rails and slides on and off with the press of two buttons. It features a Black Teflon coated carbon steel blade and comes with polymer sheath.
Delta Assault Technologies, Inc. has introduced the Delta Bayonnette. Attach to the business end of a long arm, this non-lethal device stuns with 500,000 volts of electricity (you have to enunciate each syllable of that word when you are talking 500,000 volts). Consisting of a foregrip that attaches to any Picatinny/Weaver style rail and a DAT stun muzzle brake, it is designed to fit primarily M4-style weapons. Yes, those probes sticking off the end of the muzzle brake are the shock barbs. Please note: The product may not be legal in all localities.