The 4-16x50SF is a dedicated precision rifle scope that offers the precision, the features and the ruggedness serious shooters demand. For starters, it is built with an aircraft grade aluminum alloy 30mm main body tube. With a choice of X-MOA, Illuminated X-MOA or Illuminated X-MRAD reticle, the rifle scope delivers 90 total MOA internal adjustment travel for the X-MOA reticle and 25 MRAD for X-MRAD reticles. Its turrets have ¼ MOA or .1 MRAD click graduations yielding 12 MOA / 5 MRAD per revolution depending on variant. All of the 4-16x50SF models have the reticle placed in the rifle scope’s second focal plane, so all holdover corrections, ranging and other measurements using the indicated reticle subtensions should be done at 16x magnification.