EOTECH 550 MOD 552 AA 308 RET NITE VISION COMPATIBLE HWS Manufacturer Model Number: 552.XR308 Manufacturer: EO Tech Model: Model 552 Type: Accessory-Lasers and Sights Item Type: Optic Finish: Black Weight: 11.1 oz Shipping Weight: 1.366 Feature: Night Vision Compatable Feature: Double AA Lithium and Alkaline Feature: .308 cal 150gr FMJ 2800fps Optic Adjustable Objective: false Optic Reticle: .XR308 Optic Reticle Illuminated: true