Oklahoma has fairly decent gun laws but we have been saddled with a bunch of blissninny hoplophobes in the legislature. The arguments against are pretty much the standard fare, criminal will shoot you first, criminal will take it away and shoot you with your own gun, the streets will run with blood...
State law enforcement "leadership" is against it of course as is the ORA (Oklahoma Rifle ass.) which is mostly made up of retired cops.
A version has passed both houses and Gov. Fallin is on record stating she would sign an OC law.
My expectations is that it will go back to committee for reconciliation and "gosh darn it, we just didn't have time this session to get it back out for a vote".