... .2. Retractable gunstock, the pistol can changed to a submachine gun, this production combine the feature of pistol and submachine. Using ... your wish.3. Shake function, like recoil of a real gun, brings you perfect reality. Presents you irritative scene.4. Absolutey ... on ergonomics, brings you more gun shot battle reality.6. You need a gun to feel the gun shot battle and survival from ...