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MasterPiece Arms Introduces MPA57SST Defender Semi-Auto

February 10, 2012  | 

Photo: MasterPiece Arms
Photo: MasterPiece Arms

MasterPiece Arms introduced its MPA57SST Defender semi-auto sub-machine pistol at SHOT Show 2012 in Las Vegas.

The weapon is based on the MAC design and will be available as a 5-inch fixed barrel pistol or a 16.75-inch carbine. The weapon is chambered in 5.7x28mm with a ½x28 threaded barrel that can accept a suppressor.

A 20-round magazine is standard in compliant states and a 30-round option can be had for the carbine. Masterpiece Arms will be submitting the new MPA57SST for California Compliance testing with a 10-round magazine for the carbines only.

The MPA57SST arrives with adjustable sights, a side-cocker, scope mount, and muzzle break. It retails for $599. View a demo of the new MPA57SST Semi-Auto in action at YouTube.

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