The HE509T-GR X2 is a hard-use nitrogen-purged enclosed LED sight designed for handgun applications. The HE509T-GR X2features a grade 5 titanium housing Holosuns Super LED with up to 50k hour battery life Multi-Reticle System Solar Failsafe and Shake Awake technology. The X2 version adds improved glass clarity Lock Mode and a full Multi-Reticle System providing 2 MOA dot only 32MOA Circle only or a Circle-Dot combination. HE509T-GR X2 includes an adapter plate for compatibility with *RMR footprints. HE509T-GR X2 feature 12 intensity settings two of which are compatible with night vision devices.*509T models include an adapter plate for RMR footprints. Please be aware that our adapter plate is not compatible with alternative RMR footprints which use threaded bosses such as those from Zev or Brownells. IP67 waterproof.