http://www.warrelics.eu/forum/attachments/polish-armed-forces-second-republic-si-y-zbrojne-ii-rzeczypospolitej-polskiej-1918-1939/348812d1337545660t-pistols-rifles-machine-guns-crew-served-weapons-partitioned-poland-polish-2nd-republic-1938-wz.29-mauser-bolt-release-button.jpg?s=d86d6843597146ea5b53a744f3804810