paulx,
That is a good suggestion, I had considered just turning off the threads but though it would look strange, this sleeve (which i received from UPS today, thanks Steve!) will allow me to cut it off later to add a brake if I want or even a evil flash hider if the ban is allowed to die (yeah right!, but it doesnt hurt to hope).
The sleeve from Adco is as pictured and is a high quality piece of machining with a very nice finish, well worth the $14 shipped.