0.303 calibre Browning Aircraft MG shroud. If you are making a replica gun for your display, save yourself a huge amount of time by buying this very close copy. The original Browning shroud tapers by 7.25mm over the 450mm length, to do this it would cost a lot. This is a straight piece of laser cut tube to make it affordable with no threads, 1 1/2 “x 17 ¾” (38.1mm x 451mm). Helps reduce your build time.