This museum quality Model 1877 "Bulldog" Gatling Gun reproduction was manufactured by U.S. Armament Corp. in limited quantities, believed to have only been 50, and sold through Colt or a distributor. Colt was the original manufacturer of a similar gun in the late 19th century. The Model 1877 was the first Gatling with a fully enclosed housing around the barrels and breech, and had a rear mounted hand crank that could be cranked in reverse to clear a jam. The U.S. Armament Corp. specifications list the rate of fire at 800 rounds per minute and the weight of the gun at 135 pounds not including the tripod. It was built using original Gatling diagrams and specifications. It is marked "MODEL/1877" to the left of the Bruce gravity feed device. The sights are on the right side and are graduated out to 1,000 yards. "No 44 " is marked near the right trunnion. The bronze plaque on the top of the action at the rear has "GATLING'S/BATTERY/GUN/PAT. NOV 4. 1862/MAY 9.1865/FEB 28. 1871/APR. 9.1872/MADE BY COLT'S/PT. FIRE ARMS/MFG CO/HARTFORD, CONN./U.S.A." The carriage and wheels are constructed with high grade wood, with brass fittings including a plaque that says "Built by/Colt's/Pat. Fire Arms Mfg. Co./Hartford, Conn./U.S.A." and iron wheel bands.