The Anderson Manufacturing Defender Series DS-16R (SKU: B2-K869-LE02) is a duty-oriented semi-automatic rifle chambered in 5.56 NATO. This specific model is part of Anderson's Law Enforcement exclusive lineup, which served as the foundation for the civilian Frontline Series. It is designed for maximum accessory mounting flexibility via its free-float quad rail handguard, which eliminates contact with the barrel to preserve accuracy during rigorous use. With the unfortunate news of Anderson Manufacuring closing its doors, we will not be able to warranty or exchange any items directly through them. These items are not returnable.