The SAC utilizes an alpha-numeric grid that is fixed in a very precise, consistent position relative to the bore of the weapon. The grid pattern itself varies based on the type and magnification of sights used. While the grid can be easily customized to meet the requirements of a specific end-user, we have created three standardized grid patterns that work with most weapons used by US military and law enforcement organizations.
For assault rifles, sub-machine guns, and some light machine guns (i.e. M4/, M16, MP-5, M27), the SAC grid is graduated in large, bold squares and smaller, finer squares. The large squares, which are designed to be easily visible when using iron sights or optics with no magnification, are 4 mils (equal to approximately 14.4 inches at 100 yards). The small squares are for use with low power magnified sights (i.e. 3-4X magnification). They are 2 mils (approximately 7.2 inches at 100 yards). There is a cut-out portion on the large squares that creates a 'notch' for the front sight post when using iron sights.
The grid for sniper weapons with magnified optics (10X magnification or greater) is significantly finer than the one used on assault weapons. Each square on the sniper grid is 0.2 mils (approximately 0.7 inches at 100 yards). The smaller squares allow for much more precise readings - less than 1/2 minute of angle (MOA). This type of precision is required for sniper weapons, where the accuracy standard for each piece of the system and for the system as a whole is 'better than 1 MOA'.
Unlike the assault weapon grid, the sniper grid is not a square. In order to allow shooters to record zero at extremely long engagement distances, the bottom of the grid is extended by 16 mils.
Some weapons, such as the SCAR Heavy, can be used with a broad range of sights depending on mission requirements. For those weapons, we developed a hybrid grid that allows for use with both unmagnified optics and sniper sights. The hybrid reticle has the standard assault weapon reticle with a fine reticle overlaid in the central portion of the grid. The small, fine grid is designed to only be visible when viewed through magnified optics.
The SAC provides two types of reference points, CZP and PZP...
CZP is located at coordinates ‘I,9’ on the SAC grid (at the point of the inverted triangle). CZP is zero for the average shooter on the specified weapon platform, with a specified ammunition type, at the specified range. Adjusting weapons to CZP will almost always get shooters on paper- and very close to zero- before ever firing a shot (shooters are typically within about 2 inches of zero on a 25m target). Note that, while it is possible to have an instructor or armorer adjust weapons to CZP in order to get shooters on paper, it is best to allow the shooter to complete the process. This ensures that the shooters’ individual characteristics (i.e. height, length of pull, eye relief, etc) are properly accounted for. Results will be much better if CZP is established by the actual shooter.
Each SAC has a user specified range and ammunition type that determine relative location of CZP on the grid. This only effects establishing CZP prior to initial zeroing. Adjustments can be made by the shooter to accommodate different zero ranges. The shooter simply moves point of aim slightly higher or lower on the SAC grid.
Collimator CZP provides an incremental- but significant- improvement over the capability offered by existing products. The SAC can be used similarly to a boresight to get weapons ‘on paper’, but it is more accurate AND faster and simpler to use than most other devices in this capacity. The speed and ease-of-use advantage makes soldiers much more likely to use the SAC- and it saves valuable training time. While extremely useful, though, CZP is only a secondary or ancillary capability of the SAC. Personal Zero Position (PZP), the primary type of reference point, provides a capability that no other product is able to deliver.
PZP is identified by noting point of aim (POA) on the SAC grid after zero has been established and confirmed using standard live fire procedures. Once PZP has been recorded, the shooter is able to quickly confirm zero and, when necessary, re-zero a weapon by simply adjusting POA to the recorded position. This is as accurate and dependable as conducting live fire confirmation (we still recommend live fire confirmation any time it is possible).
Different PZPs can be recorded for different ranges, sights, types of ammo, altitudes, etc., enabling soldiers to build a ‘data book’ with PZP settings for a variety of sights, ranges, and conditions.
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