If the can is gonna be on all the time, zero with the can on. I zero without a suppressor on. Then attach the can and see the difference in dope. Some cans allow you to adjust the position to allow less poi shift (ie AAC MITER system) if there is no preset adjustment like the SPR/M4 can, use a high temp paint pen to mark the position where its on the gun that allows you to return to the same position every time. I really like Surefire's design because it allows minimal poi shift since the collar rotates and not the entire can.
Last edited by Ak44; 04-18-10 at 04:34.
"There are only two kinds of people that understand Marines: Marines and the enemy. Everyone else has a second-hand opinion." — Gen. William Thornson, U.S. Army
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