The Noveske N6 4th Generation AR-15 stripped lower is made from presicion machined billet aluminum with an oversized flared magwell and integrated oversized trigger guard. This lower will be the perfect companion to your favorite upper, giving you an accurate, reliable AR-15 for almost any situation. Note: This is a Large Frame lower receiver and is designed to work with Noveske large frame uppers. Will NOT work on small AR-15 frame upper. FeaturesAmbidextrous Bolt ReleaseAmbidextrous Magazine ReleaseAdjustable Tension Screw for Perfect Fit Between Upper and LowerBillet Aluminum