Re: Sling attachment question
You may have the wrong sling version. From the TAB sling description, seems you have the heavy duty version and need the flush cup version.
TAB Rifle Sling with Flush Cups - Black
A simple more economical solution than the RBS, and EBS slings. You have the same shoulder straps as the more expensive biathlon slings. You don’t have the capabilities of positional shooting with this sling. The SBS is made for the shooter who has no intention of doing any positional shooting yet needs to be able to comfortably carry a heavy weapon for extended periods of time.
Heavy duty 1 ½" webbing, the same webbing we use in all of our rifle slings
1 ½" Fastex buckles
Shoulder straps are constructed of 1000 Denier Cordura, closed cell foam, and are separated to prevent neck pinching
User adaptability, shooter can change out swivels to fit different weapon systems
Weapon is supported by both shoulders, instead of one, which means less shooter fatigue after long periods of travel
Weapon is centered on the back for better balance when using two hands for other tasks such as carrying a primary weapon, or navigating steep terrain
Available with heavy duty swivel, HK hook, or flush cup swivel attachments