Sightmark SM19064 T-5 Magnifier 5X with Flip to Side Mount Matte Black 5 x 23 mmBuilt for shooting versatility, the Sightmark T 5 is a magnifier that mounts behind a reflex sight or red dot and provides an absolute co witness. Instantly change the magnification of your close range optic from 1x to 5x by using the T 5s flip to side mount. The magnifiers streamlined, low drag design prevents it from snagging on clothing and equipment and makes the T 5 . 7 shorter than the magnifier its replacing. Ideal for stretching your AR