Quote Originally Posted by sebbo200 View Post
Do they leave less of an imprint and bruise
I think the difference in blunt trauma would be marginal, but maybe less likely to get cut by a front-sight or other edge... The rusty edge of a Cadet front sight without a tunnel could ruin a chap's good looks.. Or give him a cool duelling scar.

https://en.wikipedia.org/wiki/Rubber_duck_(military)