Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns | 12 Gauge

About this product

Built for use with Mossberg 500, 590, and Shockwave Series shotgun models Not compatible with Mossberg 500 Bantam, Mossberg 500 Combo, Mossberg 500 Flex Models or models where the pump action extends past the receiver when pumped. See attached infographic before purchasing. Pre-1997 Mossberg shotguns were manufactured with a different mounting hole pattern and will require 6x48TPI screws (not included). Shell holder available in two sizes - 12 gauge saddle accomodating up to six 12 gauge shells and 20 gauge saddle accomodating up to seven 20 gauge shells Rail mount allows for the mounting of Picatinny or Weaver standard scopes, red dots, or other optics Installs via included set screws into the Mossberg factory mounting holes with no additional gunsmithing required