For what it's worth, I just replaced the original Kick-Ezz pad on a K-80 Parcours with a Pachmayr SC100 pad because the "sticky" Kick-Ezz pad occasionally hung up when mounting the gun & the SC100 pad w/ the smooth heel insert does not. If there is any difference in felt recoil reduction between the Kick-Ezz & the Pachmayr I can't feel it.

Re. the pad choice for the 21 Trap gun, I would want something more "period correct" looking than a Kick-Ezz if it was my gun.