When situations demand split-second target acquisition and maximum field of view, mount up the Strikefire II and get shooting. Each small click will move the point-of-impact 1/2 Minute of Angle (MOA). Is Vortex Strikefire 2 parallax-free? The whole story of Strikefire 2 may rotate around the absolute error of parallax error. Adjust the elevation and windage settings: 1. To sum up, if you want the 4 MOA dot, go with the StrikeFire II. The strike fire 2’s parallax error may be larger than some of the supermodels … Compared to its smaller red dot cousins like the SPARC AR or Crossfire, the Strikefire … Sig Romeo 5, on the other hand, offers slightly worse glass coating but has better battery life and durability at a cheaper price. 2. That said, the Romeo 5 is a 2 MOA red dot. 1/2 MOA will correspond to 1/2 inch at 100 yards, 1/4 inch at 50 yards, 1/8 inch at 25 yards, etc. The StrikeFire II red dot incorporates elevation and windage dials with audible clicks. Remove the dial covers.