Quick view American Tactical ATI ATIG15MS556ML13 MilSport 5.56x45mm 30+1 16" Black Threaded Barrel, Matte Black Picatinny Rail Receiver, 13" M-LOK Handguard, Black 6 Position Rogers Super-Stoc, Black Polymer Grip $578.65 $462.92 The ATI MilSport rifle features an a 6-position stock; 13" M-LOK rail; Picatinny rail; threaded barrel. Compare Add to Cart