The Winchester USA M855 5.56x45mm NATO 500-Round Case offers the perfect middle ground for shooters who need a serious supply of military-grade ammunition without committing to a full 1,000-round crate. This Green Tip penetrator load is manufactured to the same rigorous standards as the ammunition Winchester supplies to the U.S. Armed Forces, delivering the reliability and penetration required for professional training and tactical readiness. The Winchester M855 is the go-to load for shooters running modern AR-15 rifles with 1:7 or 1:8 twist barrels. It delivers a realistic recoil impulse and the consistent point-of-impact necessary for developing professional-level marksmanship. Whether you are punching through light barriers during a drill or engaging steel at distance, the M855 provides the terminal authority that has made it the global standard. The Winchester USA M855 Green Tip 500-round case gives you the confidence of knowing you are shooting the same quality ammunition used by the military. Trust the legendtrust Winchester. Range Note: This ammunition contains a steel penetrator core. It is often restricted at indoor shooting ranges and can damage some steel targets. Please verify your range's rules regarding Green Tip or penetrator ammunition before use.