pix request - 11.5" barrel with 11 inch keymod rail

[Voodoo_Man]

I am looking to put an 11 inch keymod rail on a 11.5 inch barrel. Specifically an 11 inch NSR with a PWS CQB at the end.

I did some googling and did not find anything that gave me an idea of if it'll work and the search function doesn't work for me here.

Thanks