I just took delivery of a titanium three section polespear/handspear gun from Keltvic in Russia. It is very well made and surprisingly light, although a heavy polespear has more punch if you are shooting something big. The company also makes a "Classic" polespear as seen below which is also constructed of titanium at around 300 bucks. Length is 7.5 feet
https://keltvic.ecwid.com/%E2%80%8Bk...-ft-p103668505
Here is one of their tridents with floppers on each tip.
Here is a selection of heat treated tips and shaft extensions.