• Made in USA 4″ Free Float Quad Rails for AR15 Pistol
• Compatible with Both Gas Tube and Adams Piston System
• Slim Profile and Ultra Lightweight Design
• Solid Aircraft Aluminum Construction with Hard Anodizing
• Precision Machined and Torture Tested for Max Durability
• Un-impeded Top Rail Platform Consistent with Flat Top Rails
• Complete with Universal QD Swivel Housing
• Includes 4PCs Rail Covers

NOTE: Note: This model works with standard AR15 upper receiver. It may not be compatible with any re-designed, oversized upper receiver.