Decided to make a barrel shroud for my tomahawk, this fits the longbow to and probably a hw80 but not tried it . Made from seamless steel tube 20mm OD with 2mm wall . Reduced at breach end to match the breach block . 2xm4 grub screws on the underside at the rear , tad of bonding when fitted . And a bit of brass to . Polished up ready for bluing . Last picture if finished blued