Hi to everyone My first post here. Sorry if I made mistakes, I'm not a native english speking.

I want to order parts for making handguard (diy project) for my shortened 15-22.

Do you know the barrel nut thread size?

And, may I please any photo of original nut and handguard converter nut from the "rifle upper" side? Is the converter plain/flat or not?

And, If you have, a photo of rifle upper w/o handguard, I'd like to see the contact surface.