Too little clearance between rail and adapter to allow sling to slide freely. Hard sharp edges will accelerate sling wear and prevent easy sling adjustment. While a 1.25" sling can be forced into the adapter, it is too narrow for a 1.25" sling. A 1.25" sling must be forced thru the slot to effect any sling adjustments.
While this item might work well as an adapter for snaphooks or push button swivels, it is NOT worth the money as a sling pass thru device.
Very disappointing quality for a Blackhawlk product.
Pros: Secure mounting
Cons: Sharp edges, not for adjustable slings.
This review was written in the old system and had content requirements that are different than reviews written today.