Magnum Research 10mm Magnum BFR Revolver, cylinders for 10mm Auto & 40S&W
(https://www.americanhunter.org/media/4kdkpsav/001_bfr10mag_l-gun_2cyl_01.jpg?anchor=center&mode=crop&width=987&height=551&rnd=133867779579530000&quality=60)
https://www.americanhunter.org/content/tested-magnum-research-10mm-magnum-bfr-revolver/ (https://www.americanhunter.org/content/tested-magnum-research-10mm-magnum-bfr-revolver/)