Designed for AR and AK pattern rifles; 4x24 models; Bullet Drop Compensating (BDC) reticle; Accommodates .223/5.56, .308WIN, .300BLK, 7.62x39 ammunition; Tactical BDC - 5.56 reticle exclusive to Hawke; Glass etched BDC reticle; Illuminated center dot and horseshoe for fast target acquisition; Zero at 50yds for .223/5.56 and .308WIN for good accuracy out to 200yds; Zero at 200yds for best accuracy and proper use of BDC; BDC provides aim points in 100yd increments out to 600yds