One of the ways to attach a sling plate to your shotgun is to get a sling plate which is installed between extentsion and magazine tube. There are many sling plates available, here is one from S&J Hardware:

S&J Hardware Front Sling Plate, Handstop

S&J Hardware Front Sling Plate, Handstop

S&J Hardware Front Sling Plate, Handstop

S&J Hardware Front Sling Plate, Handstop

This sling plate is good, it enables you to attach sling if you want one.

More information on S&J Hardware website.

Remington 870 3 position front sling plate

Here is another sling plate from S&J Hardware, it is similar to previous one but it enables you to choose one of three positions for your sling:

S&J Hardware, Remington 870 3 position front sling plate (on the left side)

S&J Hardware, Remington 870 3 position front sling plate (on the left side)

S&J Hardware, Remington 870 3 position front sling plate

S&J Hardware, Remington 870 3 position front sling plate

S&J Hardware, Remington 870 3 position front sling plate (on the bottom)

S&J Hardware, Remington 870 3 position front sling plate (on the bottom)

S&J Hardware, Remington 870 3 position front sling plate (on the right side)

S&J Hardware, Remington 870 3 position front sling plate (on the right side)

More information on S&J Hardware Website.

I always recommend S&J Hardware products because they are well made.

Related Post:

GG&G Shotgun Sling Mount Review