This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Figure Slidingwedge breechblock operation. en Slidingwedge breechblock operation TM MAY HEADQUARTERS DEPARTMENT OF THE ARMY PDUSGov Gun breeches Uploaded with
Page 2023 Free-images.com. All images are Public Domain