J&t upper

[Deathstroke]

I bought a j&t Grendel upper at a gun show a few weeks ago I believe they use er shaw barrels. What I am wanting to knows what type of different flashers will work with this barrel and for the grendel?

[pinzgauer]

It's in the J&T catalog, you can download the pdf from their site. From memory it's the same thread as AA uses.

[purplehorn1977]

should be 9/16x24 right hand