Some M4s and M16s come with the infiltrating terrorists, mostly in North Kashmir like Kupwara. But there have also been instances of weapons smuggling from Jammu, like a case a few days ago.I don't think terrorists use this copy or darra made stuff.
These local road side produced AKs are of very low quality and only third grade terrorists use these types of weapons.
Maybe porks are changing the doctrine by sending highly trained and equipped terrorists to cause a short shock or do another type of Pathankot attack.