10.5 inch lightweight aluminum barrel, with 6.08mm inner barrel diameter. It is possible to mount a silencer.9.5 inch Picatinny system handguardAluminum slide cover with integrated Picatinny rail systemPolymer pistol gripAdjustable polymer stock450 bb hi-cap magazineUnscrewable muzzle brake with 14mm threadImproved fire selectorErgonomic loading handle