One 20 round polymer magazine. One muzzle brake. Side cocker. Scope mount. Semi-auto design. Threaded barrel 1/2×28.Retail Price : 664.95Barrel Length : 5Description : MPA57SST Side Cocker 5.7x28mm 5 Inch Threaded 1/2×28 Black Barrel Grim Reaper Hydrographic Finish 20 RoundHand Gun Web Model : MPA57Made In The USA : Made In The USACaliber : 5.7X28mmTactica : TacticalCatalog Vendor Name : MASTERPIECE ARMSCapacity : 20Finish : Grim ReaperBarrel Length Range : 5″<6"Threaded Barrels : Threaded BarrelCaliber-Gauge : 5.7X28 FN SKU: 045635134812 UPC: BRAND: MasterPiece Arms Manufacturer Number: 57SSTGR Caliber: 5.7x28mm Unit of Measure: Each Classification: Firearm