Use this cantilever mount for mounting 1-inch telescopic
sights onto flattop style AR-15 rifles. The 3-inch offset of this cantilever
mount positions the scope in a forward location, allowing the correct eye
relief and head placement on an AR-15. Aluminum construction.
For more information visit:
http://vortexoptics.com/product/cantilever-ring-mount-for-1-inch-riflescope-tube-3-inch-offset