The SAC provides two types of reference points, which we refer to as Correct Zero Position (CZP) and Personal Zero Position (PZP). Understanding each of those reference points and how they work is critical to using the collimator effectively.
The SAC spigot is engineered and manufactured very precisely in order to make it rigid and durable AND to protect the barrel. However, shooters should still be careful when inserting the spigot in order to prevent damage to the SAC or the weapon.
Correct Zero Position, or CZP, is located at coordinates 'I, 9' on the collimator grid. It is primarily used to get shooters close or ‘on paper’ prior to live fire zero. CZP can also be used as an emergency zero for shooters who do not have a recorded PZP.
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