FEATURES-ACOG® Riflescope-Amber Center Illumination for M4A1-Includes Flat Top Adapter, Backup Iron Sights & Dust Cover-Magnification: 4x-Objective Size: 32mm-Bullet Drop Compensator-Length: 5.8"-Weight: 14.96oz-Illumination Source: Tritium-Eye Relief: 1.5"-Housing Material: Forged Aluminum-Mount: TA51