Although suitable for other 1:32 scale kits, this Master barrel set is aimed at the new Wingnut Wings WWI two-seater aircraft such as the Hansa-Brandenburg W.29 or the LVG kits. Meant as a turned brass barrel replacement, along with a carry handle, side bracket and sights in PE brass, the parts are finely made and, other than the two barrel parts, very tiny.
Installation is simple. Cut off the plastic barrel assembly, drill out an appropriately sized hole, assemble the brass barrel and cooling jacket and CA them into the hole. The rest is not so simple.
Working with the tiny photoetched parts for the carry handle, sights and side bracket is frustratingly difficult. The handle has little contact area to glue to the cooling jacket, once you get it bent into proper shape. Some reviewers have said these are meant to be soldered; I think that would be an easy path to madness,