UTG PRO M4/AR15 Carbine 7" Free Float Quad Rail System

• Made in USA 7" Free Float Quad Rails for AR15 Carbine • 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 12PCs Rail Covers NOTE: This model works with standard AR15 upper receiver. It may not be compatible with any re-designed, oversized upper receiver