ITW MASH hook
The MASH (Metal All-purpose Snap Hook) gateless snap hook from ITW Military Products (ITW Waterbury, who make the metal products) offers an alternative to the HK-style snap hooks in common use for sling systems. The one potential problem with the HK-style snap hook is that under certain circumstances, the snap hook can release accidentally. All it takes is for the sling and snap hook to be twisted on the rifle a certain way, and when it’s pulled, the gate opens and the snap hook releases. I did a short demo clip to illustrate this. Note that I am not touching the HK snap hook at all, only holding onto the sling. I could not get the MASH to release by twisting and pulling on the sling.