- Isis terrorist photographed aiming a 10-foot rifle out of a window
- The fearsome weapon is thought to fire 23mm calibre bullets
- 'Gun could be effective against lightly armoured vehicles,' says expert
Fearsome: An Isis terrorist has been photographed aiming a 10-foot long sniper rifle out of a flat window in KobaneGigantic: This picture shows a row of 23mm bullets - the same size as those fired by the 10-foot rifle
What sort of effect this gun would have remains open to debate, however, according to firearms expert David Dyson.He told MailOnline:
'The problem with identifying the effect of this gun is firstly that we don't know for sure what the calibre is, although there wouldn't be a lot of point in building something like this if it wasn't of a significant calibre.
Secondly, and probably of more importance, we don't know how well it is made: is the barrel accurately machined and rifled?
They will be effective against personnel and vehicles including lightly armoured ones.'
They toured in a convoy around villages they said they had captured from Syrian rebels.