Durable and impact resistant glass fiber reinforced matte black polymer construction. Four-way anti-tilt. High visibility blue follower and high longevity stainless steel spring for reliable feeding. Features: positive grip texturing; left and right side windowed main body with remaining round count indicators; over-insertion stop; and removable flared floor plate. Not compatible with AR-10B, SCAR 17S, LAR8, HK417, or rifles that use M14, FAL, or HK G3/91 patterned magazines. Note: This product cannot be shipped to California, Colorado, Connecticut, District of Columbia, Hawaii, Massachusetts, Maryland, New Jersey, New York, and Vermont.