Front Post Enhancement sight for AR15 WITH A2 STYLE POST MOUNT. Designed to enhance the visibility of existing sight posT. Dual fiber framing sight funnels eye to center post for fast sight post and target acquisition resulting in quicker follow up shots and increased accuracy. Easy installation onto AR15 with A2 style post frame found on Weight: 11.5 grams Material: Glass filled Nylon Color: Black Fiber Diameter: 0.040" Fiber Color: Green Made in USA