• Made in USA Low Profile Quad-rail Gas Block for AR15
• Fits 0.75" Regular Barrel and Standard Gas Tube
• Replaces A2 Front Sight and Provides 4 Picatinny Rails
• Precision Machined from Aircraft Aluminum with Tight Tolerance Control
• Hard Anodizing Black Matte Finish
• Top Rail Lower than Flat Top by 0.28"
• Includes Gas Tube Roll Pin and Locking Screws