Yes, provided they have the proper NFA tax stamp applied to them.
Suppressors are legal, yes.
Yes. You have to go through the standard federal process for suppressors.
sorry- no. Illinois law does not permit the possession of many firearms, such as full automatics, and does not permit possession of suppressors. See 720 ILCS 5/Art. 24 in the Illinois criminal code for more information. 2015 there are separate bills in both the house and senate which would legalize suppressors in IL. Call your reps and encourage them to support them.
Usually suppressors can be screwed on, so there should be notches to screw it on.
Depends on the suppressor. Many are made to be taken apart, soaked in solvent, brushed, and reassembled.
They were the Sooners. They were there before it was legal to make the run.
Check your local library, gun shops, gun shows and don't forget about google and dogpile search engines.
You can purchase silencers or SUPPRESSORS in attachments after selecting the gun I believe it is 2000 CoD points
Oklahoma amended its gun law effective November 2012. Wikipedia has a good summary of it in an article titled "Gun Laws in Oklahoma."
No, at least not for regular people. Maybe for cops, and maybe for licensed pest-control workers (who might have to use a silenced .22 rifle to kill some rodent or bird that is causing trouble). But maybe not even then.
Varies by country. In the US, it's 18 for Title I long barreled firearms (rifles and shotguns), and 21 for handguns and Title II NFA items (machine guns, short barreled rifles, suppressors, etc).
What is the legal length of a knife can you carry in the state of Oklahoma? What is the legal length of a knife can you carry in the state of Oklahoma?