Hines Brothers
Hines Brothers are a firm of armourers who used to make crossbows and other weapons in Ankh-Morpork. Among their customers were the Watch. They were still in business at the time of Night Watch, but John Keel's special insight into the future revealed that in five years time, the firm of Burleigh and Stronginthearm would be setting up to offer competition. It is unclear as whether or not Hines are still in business.