In the 1980s and into the 90s, Delrin* caught on as a material for aftermarket paintgun bolts and pumps. Delrin is an acetal resin developed by DuPont in the early 1950s. It is a polymer derived from formaldehyde that was originally called “synthetic stone” by Dupont’s research staff, and was later given the brand name of Delrin. While Delrin is a strong material, it has other qualities that are very unlike stone. From a manufacturing aspect it is easily machined with the same tools and equipment used to create parts out of aluminum and steel. From the applications point of view, Delrin is not only strong, but it is also considered a self lubricating material. It can be used as a bushing material between metal parts to reduce friction and wear, and it can also be used to make whole parts that will exhibit little friction or wear as they interface with metal parts.
Rest of article:
http://www.warpig.com/paintball/tech...c/fbmtriggers/