Rofsten
Developed at the Royal Ordnance Factory at Fazakerley (ROF), the Rofsten was an odd Sten prototype with a redesigned magazine feed, ergonomic pistol grip, selector switch and cocking system. The weapon was cocked by pulling the small ring above the stock. A large flash eliminator was fixed onto the barrel, and a No.5 bayonet could be fixed. It was made to a very high quality standard and had an increased rate of fire (around 900 rounds per minute). The Rofsten was made in 1944 as a single prototype and ROF wanted to submit it to trials the next year. Despite better quality there were numerous reliability problems due to the much higher rate of fire. The budget cuts prevented the modifications and this version never got beyond the prototype stage. 
During World War II, Military Police schools were established at Camp Gordon, Fort Benjamin Harrison, with the Military Police Replacement Center established at Fort Custer. MPs also trained for port security at Fort McHenry.[8] Military Police soldiers moved traffic along the Burma Road, supported amphibious operations on Normandy beachheads,[11] and managed enemy prisoners of war from Italy to the South Pacific.
When the Red Ball Express (a supply route stemming from Normandy to the front lines) was established in August 1944, MP performed route reconnaissance and security to keep the trucks and supplies flowing. This was the 793rd Military Police Battalion’s (deactivated in 2014) first mission in theater and commemorated this in their coat of arms and unit insignia; which consists of a field of green, a yellow road, and two red disks symbolizing the famed route.
Thanks to the actions of First Lieutenant John Hyde and his detachment of MP, The Corps was heralded for gallantry at Remagen, as a fighting force in numerous combat actions and as peacekeepers at war’s end. In 1944, the Army again saw the need for a unit to investigate crime involving soldiers in Europe. The United States Army Criminal Investigation Division was established as a branch of the Provost Marshal General’s Office and has continued investigative activity since.
After the war ended, cavalry units in Germany were utilized to form the United States Constabulary, a police-like patrol organization. It was disbanded in the 1950s.
In 1949, the newly formed Defense Department was in the process of reorganizing the Army and plans were developed to disband the Military Police Corps. But when Congress passed the Army Reorganization Act in May 1950, the Corps survived, remaining a separate branch of the Army.