My mini bullet pen I guess is what you call it

ran out of ink and in a pinch wanted to see if my SwissChamp pen would be the same length and might work.

It was the exact same length but the plastic piece on the end of the pen keeps it from working on the bullet pen. Took my knife and shaved off the ends of the plastic so it was smooth and we have a perfect fit.

Plus it writes better than the refills you get at Office Max so I just ordered 10 refills for the pen since this is my daily carry pen that gets a lot of use from writing on paper to marking a wall for measurements. So thought this might be handy for a few that might carry this style of pen.