Yes and no. They make them; however according to J and J Armory:
"Broughton Rifle Barrels are world renowned for accuracy and are available only on J & J Armory AR-style weapons. This patented process insures low amounts of fouling, thus the barrel life could last double its life"
The J and J Rifles also uses JD Machine Tech Match Upper/Lowers. Overall a pretty nice weapon. J&J Armory
I have a Broughton on my AR10 that shoots like a bolt rifle. Reach out to Tim at Broughton; find a good builder that will chamber and contour the blank for you. You won't be sorry!