Olight SR50/M3X/M31 Blue Filter

NOTE: If ordered by itself, this item has the minimum shipping charge of $7.75 for B.C., $10.50 for AL, SK, MB and $12.50 for the rest of Canada. If added to an order with a shipping charge already, it will only add $0.45 to $1.50 to the shipping cost. 
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Blue Filter

Useful for map reading, hunting to avoid spooking game, tactical applications, blue provides a little more light for easier viewing or navigation over red filters.