COMER, GA (October 2012) – MasterPiece Arms, manufactures of the MPA MAC Line of semi-auto submachine pistols and carbines, is pleased to introduce the new MPA570SST-SBR Short Barrel Rifle. Based on the successful MPA57SST 5.7x28mm Pistol, the new MPA570SST-SBR Short Barrel Rifle features a ten-inch threaded barrel with ½ x 28 threads making it suppressor ready. The MPA570SST-SBR Short Barrel Rifle comes with adjustable front and rear sights, a side-cocker, scope mount, 20 Round Magazine, Muzzle Brake, Strike Industries Foregrip, MPA Short Aluminum Quadrail, Low Profile Buttstock and Side Folding Attachment. It features all the accuracy, low recoil and performance expected from the MasterPiece Arms Defender series. The weapon also cycles high velocity and subsonic ammo without the need for adjustments to the weapon. Please note all NFA rules apply. This gun is American Made, ships in its gun case and offers the MasterPiece Arms Lifetime Guarantee. MSRP is $799.95.