Samson Evolution 12.37in. AR-15/M4 Handguard Black. Light weight and durable these Samson Evolution 10" Series Free Floating Rails offer the perfect upgrade for 3 gun shooters LE/Military or weekend enthusiasts alike. The 1.8" facetted OD offers a comfortable shooting platform while not being to large for most shooters. Samson Evolution 10in Series Handguard Rails can be added or removed easily to adapt the hand guard to your needs (units can also be mounted at 45 degree offsets). Specifications for Samson Evolution 10in Series Handguard: Manufacturer: Samson Color: Black Gun Make: AR Platform Gun Model: M16 M4 AR-15 Gun Type: Rifle Handguard Type: Free-Float Gun Rail: Picatinny Weight: 9.8 oz Condition: New Included Accessories: Standard Quantity: 1 Features of Samson Evolution 10in Series Free Floating Rail: Mil-spec hard coat anodized Thermal bushing locks onto the stock barrel nut No special tools required for installation The inside diameter is large enough to fit most suppressors (1.56") Continuous mil spec top rail Duel anti rotation tabs Relieved for most gas piston systems Thermal Bushings helps reduce heat transfer to hand guard Supplied with 2x 2" rail kits and 1x 4" rail kit Package Contents: Samson Evolution 10" Handguard Rail Samson 01-03003-01: Evolution 12.37in. AR-15/M4 Handguard Black