Based on the successful, standard MAC design the new MPA57SST will be available in both a 5-inch fixed barrel pistol and a 16.75-inch carbine. Available in 5.7x28mm with 20-round magazines standard and a 30-round option for the carbine, the MPA57SST will feature a threaded barrel with ½ x28 threads making is suppressor ready.
The MPA57SST Defender Semi-Auto will come with adjustable sights, a side-cocker, scope mount and muzzle break and features all the accuracy, low recoil and performance expected from the Masterpiece Arms Defender series. MSRP will be $599. Masterpiece Arms will be submitting the new MPA57SST for California Compliance testing with a 10-round magazine for the carbines only.