Muley,

T/C made a decapper for #11 caps, I have one. It's about 4.5" long and the decapper end has two "fingers" incorporated into it which you push down over the cap and pull back outward to take an unfired cap off. There's an open slot just above them which allows you to dump the cap into your hand. It also has a removable nipple pick that you can unscrew on the other end with a hole for lanyard. It works great for their sidelock muzzys and their Scout rifle but I think it was developed before modern style inlines... I don't think it would work on one.

BPS