We are on third part on the KRISS Vector vs. UMP story where they test the recoil of both .45 SMGS after being tested by two police departments in Texas... "For this portion we we decided to try and quantify the recoil reduction of the Vector versus its main competitor, the HK UMP (in this case a converted HK USC SBR was used, however it is identical except for the roll marks)."

Read the full story at The Firearm Blog.