The flat top mount for the M16/AR15 family of weapons is compatible with a wide array of sporting optics. It features 5 mounting grooves for weaver-style rings as well as STANAG mounting points, and it is a see-through design that allows the shooter to view the target through the rifle's iron sights when mounted. Availability: Usually ships the same business day. IORflatopmountNATOMSRP: $80.00USA Optics: $65.00 Have a Question? Interested in an item? Give us a call or Send us an E-mail! Phone:1-404-433-7371 E-Mail: LauraAMeade@aol.com or mbskin@yahoo.com We're available anytime after 8:30amEST!!