I normally carry a nice standard Fisher space pen in tactical black, nice slim solid pen but have started to use these little goodies http://www.heinnie.com/Pens/Tombow-Pens/c-1-290-768/ Tombow Airpress and Tombow Pfit, while not heavy duty they're very light weight, compact and come in funky colours, maybe one to match or contrast with a SAK The Airpress pen will right upside down like the Fisher space pen and the little Pfit has a great pocket clip. Both very cheap, even the refills, worth a look
Quote from: jekostas on November 20, 2011, 10:41:22 PMInka Pen (though refills are expensive).The refills don't have to be expensive. You can just pull the short ballpoint cartridge out of the plastic module and replace it with any multi-pen refill. You may have to wrap the end of the cartridge with tape or add a drop of rubber cement to keep it in place, but it will work perfectly. I use Fisher space pen refills in mine. --Bob Q
Inka Pen (though refills are expensive).