[toolmaker]

Friend has a Remington 870 with factory extended mag. There is a hole in the bottom of the clamp holding the extended mag to the barrel for a swivel, but I need to know who makes the swiver to fit this hole. Ay help appreciated.

[USMCsilver]

I was going to suggest either a Knights or GG&G QD swivel, but I just checked and they do not fit.

However, I can suggest a GG&G side sling adapter that is mounted between the mag extension and barrel mount housing. It is what I have and works quite well.

Cost is $12 HERE! (http://www.gggaz.com/products/shotgun_slingatt.php)

http://www.gggaz.com/images/Shotgun_SlingAtt.jpg

[dfariswheel]

Uncle Mike's makes a whole series of sling swivel attachments for the Remington Police guns.

http://www.uncle-mikes.com/

You can buy just swivel components from Gun Parts Corporation:

http://www.e-gunparts.com/cproducts.asp?idDept=328#TheTop