Quick view ET ARMS INC Et Arms Inc , Et Arms Etagomega556ml15 Omega 5.56 16 W/sts 30r $444.18 5.56x45 mm caliber 16 inch barrel with a 1:8 twist polymer carbon fiber infused buffer tube polymer carbon fiber infused lower reciever polymer upper with metal inserts nano saf-t-first trigger 15 inch m-lok rail 30rd mag flip-up sights ati sr-1 stock 6... Compare Add to Cart