First Breach 5.56 NATO New Brass Case 250 Rounds 556 brass 250. For every casing First Breach produces its own brass cups from new premium brass strip which are drawn into finished casings. Each and every production line includes a series of quality control checkpoints. All of First Breachs products are qualified through First Breachs MOCs (Match-grade Ocular Checkpoints) as well as our MLTs (Match-grade Laser Terminals) which utilize more than a dozen lasers and a 3D imaging system to measure the specifications and composition of every single unit. In addition to these checkpoints First Breach pulls units from its lines every 15 minutes to perform further tests in our QA (Quality Assurance) laboratory. First Breachs process ensures that each casing operates at match-grade performance has consistent tolerances and reliability and mitigates variances. Specifications for First Breach 5.56 NATO New Brass Case: Manufacturer: First Breach Gun Type: Rifle Caliber: 5.56x45mm NATO Fabric/Material: Brass Features of First Breach 5.56 NATO New Brass Case Match-grade new brass casings. Unprimed. Secure pouch velcro seal with bottom gusset. Package Contents: First Breach 5.56 NATO New Brass Case First Breach 556 brass 250: 5.56 NATO New Brass Case 250 Rounds