Trijicon TA02-C-100431 ACOG 4x32 LED Battery Illuminated Red Crosshair 300 Blackout Ballistic Reticle with TA51 Mount ACOG 4x32 LED Scope, Battery Illuminated Red Crosshair 300 Blackout Ballistic Reticle w/ TA51 Mount 300 Blackout BDC reticle calibrated with both supersonic (110gr - 125gr) and subsonic (174gr - 240gr) ammunition The ranging reticle allows for bullet drop compensation out to 600 meters without any manual adjustments Over 12,000 hours on setting #4 using supplied alkaline battery Forged Aluminum Housing Material