GC_UPC 5.56 Guardian 16in 4150 barrel 15in Mlok rail APF M-4 buttstock OD GR Cerak $755.56 RI282OD show more like this 19.99 The Armory at LTT GC_UPC 5.56 Guardian 16in 4150 barrel 15in Mlok rail APF M-4 buttstock OD GR Cerak $761.60 RI282OD show more like this 15.00 SHTF Tactical GC_UPC 5.56 Guardian 16in 4150 barrel 15in Mlok rail APF M-4 buttstock OD GR Cerak $782.00 RI282OD show more like this Free shipping on orders over $300 Skogen’s Gun Supply