Installing a Magazine extension on a 870, 1100 Special Field, or 1187 Shotgun
This video demonstrates how to install a magazine extension on Remington 870, 1100 Special Field, and 1187 shotguns. It covers safely removing the magazine spring retainer, addressing internal magazine tube crimps using the Brownells Dent Raiser tool, and final assembly with a function check. Proper spring trimming and securing the extension are highlighted for reliable feeding and increased capacity.









