This has been around for ages. It was a april fools joke that got so much attention that it was put into production
Airsoft Forums UK
AirsoftTed
If they wern't so expensive I'd probably wear one for shits and giggles. My bayonet charges screaming in Glaswegian would be twice as authentic and intimidating!
TacMaster
Hah, didn't know they'd been around that long 
