Found a bunch of these bore brushes out at my favorite scrapyard. They seem to be 105mm and fit the standard 105 howitzer cleaning stave, but they are longer than the typical 105 brush and do not seem to be the (longer) borecap brush either. Does anyone recognize what they are from? Considering the scrapyard's history, I would guess at either 106 recoiless or else 105 Leopard.
In the photo below are 3 of the brushed I found next to the typical 105 brush and it's storage bag.
