I have several brand new in the package GG&G single point sling attachments for Remington 870, 1100 and 11-87 shotguns (I believe these will only fit the 12 ga. models):
 
http://www.gggaz.com/index.php?id=79&parents=153,172

These are right-handed (sling attaches on the left side) and accommodate up to 1 1/4 in. slings. Puts the sling mount between the rear of the receiver and the stock. Precision machined from 7075 aircraft grade billet aluminum alloy and Type III hard anodized matte black. Made in the USA.
 
MSRP is $30. I will take $25 plus $2.50 shipping.
 
I would consider trades. Looking for the following:

- GG&G (or similar quality) AR single point sling attachments for collapsible stock

- quality single point slings

- kydex/leather IWB and quality tactical leg drop holsters for 1911s, Glocks and S&W K-frames

- quality 870 collapsible stock (like Knoxx or Mesa Tactical)
 
Would also consider ammo, knives, flashlights, gear, AR/H&K/Glock/1911/870 parts and accessories. Please PM trade offers.