I just finished up a batch of "Q" Full length Barrel shrouds for the B26-2 / B26 rifles. They are aluminum with a Vinyl Carbon Fiber pattern covering on them. If you leave the aluminum they get super polished or discolored where you grab the barrel when cocking.
They will fit other rifles with a 16mm barrels but it may not go all the way down on the barrel. The B26 barrel is only 12 ½ inches long from the barrel pivot and the shroud is a full 15 inches long and 1 1/16 inches in daimeter.
$ 45.00 shipped is the price.