What do you use on your firearm, be it a Mossberg shotgun or rifle, Remington, M4/AR platform, etc... ?
I have on one OFM shotgun a CDM Gear MT clamp with QD push button 1 1/4" sling swivel. It clamps to the magazine tube (MT) and is on my 590A1.
On another, Allison's 500, we are using the magazine tube plate adapter supplied with the Specter Gear 2 point sling. The strap on the end of the sling is 1", but can be removed and used with a 1 1/4" sling swivel. The other end of the sling is the wrap around style that wraps the stock rather than using the swivel.
Another SAP I use on my 590A1 is the ERGO ambi end plate adapter mounted between the receiver and stock. It has the HK style loops and the single point sling I use there has the ITW MASH hook that works similar to a key ring. The adapter is aluminum and is about 3/16" thick. Thick enough I needed a longer stock bolt which I found at my local hardware store.
One mounting solution I recently became aware of is the Button Sling. It uses a post, which can be purchased for nearly any weapons platform as far as I'm aware, and one sling can easily be transfered from one firearm to the next.
There are so many mounting solutions available, it can def get confusing. I hope we can get some ideas and talk about how we use them to further help our community make educated decisions with regard to their need and specific circumstances.