TactaLoad Flash-5 Gunstock Black Synthetic Fixed With Storage Compar. It addresses an all too common problem of limited ammunition capacity with pump action shotguns. The FLASH-5 stock remedied this problem by providing 5 additional shells in the most opportune location in order to reload fast. Not only does the FLASH-5 provide the most convenient storage of ammunition it also protects them from the elements and accidental external damage. This stock holds 5 12 gauge 2.75"-3.5" shells. Specifications for TactaLoad TLFL5-R8712 Flash-5 Gunstock Black Synthetic Fixed With Storage Compar: Manufacturer: TactaLoad Gun Model: Remington Model 870 Stock/Brace Material: Synthetic Color: Black Gun Make: Remington Quantity: 1 Length: 13.5 in Fabric/Material: Synthetic TactaLoad TLFL5-R8712 Flash-5 Gunstock Black Synthetic Fixed With Storage Compar What firearm models does the manufacturer say TactaLoad TLFL5-R8712 Flash-5 Gunstock Black Synthetic Fixed With Storage Compar is compatible with? The manufacturer suggests that TactaLoad TLFL5-R8712 Flash-5 Gunstock Black Synthetic Fixed With Storage Compar is compatible with Remington Model 870