Interesting Engineering on MSN3d
Next-gen M1 Abrams ammunition combines four legacy rounds into one powerful shot
US Army approves full-rate production of the 120mm Advanced Multi-Purpose (AMP) ammunition for M1 Abrams tanks.
American Rifleman6d
Review: LWRCI IC-9 Carbine
When a round is fired, the walls of the cartridge case momentarily expand to fill the chamber, including this recessed ring. This slightly larger than usual point of expansion for the cartridge ...