Features: 1:10 twist Concentric LH 14×1 metric thread and ready for a variety of muzzle attachments Chrome moly 4150 nitride treated barrel 1/16″ stamped 4140 steel nitride treated receiver RAK-1 Enhanced Trigger Group Larger T-shaped magazine catch Compatibility with AKM furniture Standard AKM sights AK Side Scope Rail Mount Retaining Plate Bolt hold-open notch on safety selector Slant Brake Accepts all standard AK mags Includes (1) 30 rd. magazine