Shop › MESA SURESHL PLY CARRIER MSS 500 12G MESA SURESHL PLY CARRIER MSS 500 12G $79.95 Mesa Tactical SureShell Carrier, 6-Shell Side Saddle, Fits Mossberg 500, 12 Gauge, On-gun shotshell carriers, Black Finish 94750 Quantity: Add To Cart Added! Mesa Tactical SureShell Carrier, 6-Shell Side Saddle, Fits Mossberg 500, 12 Gauge, On-gun shotshell carriers, Black Finish 94750