The T33, improvised during WW2 by USMC Corporal Tony Stein. Here's a quick spec per wikipedia: Called the T33 it was fitted with a buttstock and bipod to allow for use without a tripod or other mount. The T33 consists of an AN/M2, a butt stock from a M1919A6 and a rear sight and bipod from a BAR 1918. These conversions were based on field conversions carried out by soldiers in the Pacific Theater during World War II. A personally modified weapon of this type, using the butt stock from an M1 rifle, was used by Marine Corporal Tony Stein during the invasion of Iwo Jima. Stein would posthumously receive the Medal of Honor for his actions during the battle. It had a rate of fire in excess of 1,200 rpm and was nicknamed the "Stinger." Oh well......maybe next Christmas.