https://www.combathunting.com/WINCHESTER-Universal_Shotgun_12_Gauge_Shotshell_Holder_Ati.html
SHO0500 Universal Shotgun 12 Gauge Shotshell Holder Ati - Mossberg Accessories
Tactical shotgun accessories. ATI shotgun shell holder made from DuPont extreme temperature glass reinforced polymer. Shell holder fits any ATI top folding...
shotshell holdermossberg accessoriesuniversalshotgungauge