Armsel Striker
The Armsel Striker, also known as the Sentinel Arms Co Striker-12, Protecta, Protecta Bulldog and SWD Street Sweeper is a 12-gauge shotgun with a revolving cylinder that was designed for riot control and combat. History. The Armsel Striker was designed by Hilton R. Walker, a Zimbabwean citizen, in 1981. Walker subsequently emigrated to South Africa, bringing with him the design for the Striker shotgun. His shotgun became a success and was exported to various parts of the world, despite some drawbacks. The rotary cylinder-type magazine was bulky, had a long reload time, and the basic action  was not without certain flaws. Walker redesigned his weapon in 1989, removing the cylinder rotation mechanism, and adding an auto cartridge ejection system. The new shotgun was named the "Protecta". A copy of the Striker was made by the US gunmaker Cobray and marketed as the SWD Street Sweeper from 1989 through 1993. Design and features. The weapon's action is similar to a revolver's, using a rotating cylinder. Since the Striker uses a conventional double action only trigger and a very large and heavy cylinder (compared to handguns), Walker added a pre-wound clock-work spring to revolve  the magazine. This made loading slow, in exchange for a shorter and lighter trigger pull. The design was changed into having a cocking lever on the right side of the barrel. The first designs were criticized as having a slow and cumbersome firing mechanism. The shells had to be individually loaded and then the drum's clockwork spring wound. Shells were ejected by an ejector rod along the right hand side of the barrel. The last version has the clockwork winding mechanism removed, the ejector rod replaced by an automatic ejection system, and a cocking lever in the rod's  place that winds the drum automatically. The Striker has a twelve-round magazine capacity and short overall length. Compact variants hold 7 rounds. Availability in the United States. The Striker and Street Sweeper were declared destructive devices under the National Firearms Act with no sporting purpose by Treasury Secretary Lloyd Bentsen in 1994, and their transfer and ownership is regulated by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF).