Quad Rail, 12" Free Float

Includes: Free float quad rail handguard, aluminum barrel nut, anti-rotation set screw, Allen wrench. Materials: 6061 Aluminum Alloy Compatibility: Not Compatible with Bushmaster Carbon 15 rifles serial number E18000+ unless Bushmaster barrel nut is used. Weight: 15 oz Length: 12 in Height: 2.5 in Internal Diameter: 1.7 in Warranty: Lifetime through Monstrum Tactical